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121-611: The Digital Equipment Corporation (DEC) Museum Project began in 1975 with a display of circuit and memory hardware in a converted lobby closet of DEC's Main (Mill) Building 12 in Maynard, Massachusetts . In September 1979, with the assistance of Digital Equipment Corporation, Gordon and Gwen Bell founded the Digital Computer Museum in a former RCA building in Marlboro, Massachusetts . Though entirely funded by DEC and housed within

242-426: A 19-inch rack . The backplanes allowed 25 modules in a single 5-1/4 inch section of rack, and allowed the high densities needed to build a computer. The original laboratory and system module lines were offered in 500 kilocycle, 5 megacycle and 10 megacycle versions. In all cases, the supply voltages were -15 and +10 volts, with logic levels of -3 volts (passive pull-down) and 0 volts (active pull-up). DEC used

363-458: A PDP-1 and (more reliably) on a PC. Realistic image synthesis Synthetic lighting and shading algorithms for models of three-dimensional objects have classically been tested by rendering of a teapot. In the early 1970s, Martin Newell, working at The University of Utah, decided to use his teapot as an object with which to test various modeling, lighting and shading techniques. In the summer of 1982, at

484-544: A Sinclair ZX80. To the nascent historical software collection, the first BASIC written for the Altair and VisiCalc Beta Test Version 0.1 was added. Between Fall 1995 and Spring 1996, The museum sponsored the Early Model Personal Computer Contest. A call for the earliest personal computers netted 137 additions to the collections. The judges, Steve Wozniak, David Bunnell, and Oliver Strimpel awarded prizes for

605-593: A VAX CPU was the VAX-11/780 , announced in October 1977, which DEC referred to as a superminicomputer . Although it was not the first 32-bit minicomputer, the VAX-11/780's combination of features, price, and marketing almost immediately propelled it to a leadership position in the market after it was released in 1978. VAX systems were so successful that in 1983, DEC canceled its Jupiter project , which had been intended to build

726-510: A Virtual Reality Chair among other interactive stations focusing on graphics. The other areas addressed writing, making sound, calculating, playing games, exploring information, and sharing ideas. Against a backdrop of the explosive growth of the Internet, this 4,000-square-foot exhibit addressed the history, technology, and applications of the growing computer network infrastructure. Exhibits included an interactive live air traffic control display,

847-541: A common language - COBOL. A 1970s vignette portrayed a PDP-8 minicomputer being used backstage to control theater lighting, and applications to scientific computer were shown with a CRAY-1 at the European Centre for Medium-Range Weather Forecasts. A student publishing her school newspaper using a Macintosh showed the beginning of personal computing. The exhibition demonstrated eight application areas using some 40 computer stations. The first area, "Making Pictures" featured

968-479: A computer animation theater. Many of the exhibits were developed with the help of university and corporate research labs. The exhibition was developed under the direction of Oliver Strimpel with Geoff Dutton. Digital image processing The gallery included the history, technology and applications of digital image processing. Possibly the first-ever digital image was acquired from Jet Propulsion Labs, consisting of hand-assembled colored strips of line-printer output from

1089-466: A corporate facility, from its inception the museum's activities were altruistic, with an industry-wide, international preservation mission. In spring 1982, the museum received non-profit charitable foundation status from the Internal Revenue Service . In Fall 1983, The Computer Museum, which had dropped "Digital" from its title, decided to relocate to Museum Wharf in downtown Boston, sharing

1210-862: A few artifacts were moved to the Museum of Science for eventual exhibits. The historical artifact collection was sent to the Computer History Museum forming the base of the museum's collection. An extensive archive of Computer Museum documents and videos of the history of the museum, formative memos at Digital Equipment Corporation and other materials was compiled by Gordon Bell and is now maintained by The Computer History Museum. Archive sections include: exhibits, with layouts and design documents; Pioneer Lecture Series Videos; Posters; The Computer Bowl; Museum Reports and Annual Reports; and Marketing material, such as brochures, guides, leaflets, press releases, and store catalogs. A Files section contains general documents of

1331-606: A national and then international network of computer clubhouses was established. After the museum closed in 1999, the Clubhouse moved to the Museum of Science, Boston , which also served as the headquarters of The Computer Clubhouse Network. In 1988, the first annual Computer Bowl was held as a fund-raising event for The Computer Museum. The concept played upon rivalries between East Coast (especially Route 128 around Boston) and West Coast (mainly Silicon Valley) technology industries. It took

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1452-576: A new virtual memory system, and would also improve performance by processing twice as much data at a time. The system would, however, maintain compatibility with the PDP-11, by operating in a second mode that sent its 16-bit words into the 32-bit internals, while mapping the PDP-11's 16-bit memory space into the larger virtual 32-bit space. The result was the VAX architecture, where VAX stands for Virtual Address eXtension (from 16 to 32 bits). The first computer to use

1573-476: A new device to be added easily, generally only requiring plugging a hardware interface board into the backplane and possibly adding a jumper to the wire wrapped backplane, and then installing software that read and wrote to the mapped memory to control it. The relative ease of interfacing spawned a huge market of third party add-ons for the PDP-11, which made the machine even more useful. The combination of architectural innovations proved superior to competitors and

1694-512: A new need. Each new usually lower priced class is maintained as a quasi independent industry (market). Classes include: mainframes (1960s), minicomputers (1970s), networked workstations and personal computers (1980s), browser-web-server structure (1990s), palmtop computing (1995), web services (2000s), convergence of cell phones and computers (2003), and Wireless Sensor Networks aka motes (2004). Bell predicted that home and body area networks would form by 2010. Bell has been described as "a giant in

1815-454: A pressure-sensitive pad that outputs the distribution of pressure under their figures onto a display. Sonar: a ceiling-mounted sensor measured a visitor's height by bouncing a signal off the top of the head. Robot Theater A collection of robots were arrayed inside a theater, each of which, when highlighted in the theater's video program, lit up and, in several cases, performed movements. Mobile robots included: Shakey , Prototype Mars Rover,

1936-462: A profit at the end of its first year. The original Laboratory Modules were soon supplemented with the "Digital System Module " line, which were identical internally but packaged differently. The Systems Modules were designed with all of the connections at the back of the module using 22-pin Amphenol connectors, and were attached to each other by plugging them into a backplane that could be mounted in

2057-423: A program of pioneering computer-animated shorts, including several from Pixar , such as Luxo Jr. A permanent gallery devoted to the history and technology of artificial intelligence and robotics opened in 1987. Knowledge-based systems Interactive exhibits focused on expert systems. Examples included a medical diagnosis system, a simple rule-based simulated bargaining store-keeper with whom visitors haggled over

2178-430: A real-time view into stock exchange transactions, and several internet stations (not commonly found in public spaces at that time) with constantly changing selections of sample web sites to reveal the diversity of Internet applications. In this 2,200 square-foot virtual undersea world, visitors used interactive stations located in front of a giant projection display to design their own virtual fish, and then release it into

2299-510: A renovated wool warehouse with Boston Children's Museum . Oliver Strimpel, recruited from the Science Museum in London , was appointed to develop a major exhibit on computer graphics and image processing, later being appointed executive director in 1990. On November 13, 1984, the museum officially re-opened to the public at its new 53,000 square foot location. The initial set of exhibits featured

2420-807: A research group, then joined it full-time in August 1995, studying telepresence and related ideas. He was the experiment subject for the MyLifeBits project, an experiment in life-logging (not the same as life-blogging ). This was an attempt to fulfill Vannevar Bush 's vision of an automated store of the documents, pictures (including those taken automatically), and sounds an individual has experienced in his lifetime, to be accessed with speed and ease. For this, Bell digitized all documents he has read or produced, CDs, emails, and so on. Bell died of aspiration pneumonia at his home in Coronado, California , on May 17, 2024. He

2541-438: A selection of System Building Blocks to implement a small 12-bit machine, and attached it to a variety of analog-to-digital (A to D) input/output (I/O) devices that made it easy to interface with various analog lab equipment. The LINC proved to attract intense interest in the scientific community, and has since been referred to as the first real minicomputer , a machine that was small and inexpensive enough to be dedicated to

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2662-431: A self-sustaining business, the company would be free to use them to develop a complete computer in their Phase II. The newly christened "Digital Equipment Corporation" received $ 70,000 from AR&D for a 70% share of the company, and began operations in a Civil War -era textile mill in Maynard, Massachusetts , where plenty of inexpensive manufacturing space was available. In early 1958, DEC shipped its first products,

2783-504: A separate input/output processor for further performance gains. Over 400 PDP-15's were ordered in the first eight months of production, and production eventually amounted to 790 examples in 12 basic models. However, by this time other machines in DEC's lineup could fill the same niche at even lower price points, and the PDP-15 would be the last of the 18-bit series. In 1962, Lincoln Laboratory used

2904-481: A single large mainframe case, with a hexagonal control panel containing switches and lights mounted to lie at table-top height at one end of the mainframe. Above the control panel was the system's standard input/output solution, a punched tape reader and writer. Most systems were purchased with two peripherals , the Type 30 vector graphics display, and a Soroban Engineering modified IBM Model B Electric typewriter that

3025-643: A single task even in a small lab. Seeing the success of the LINC, in 1963 DEC took the basic logic design but stripped away the extensive A to D systems to produce the PDP-5 . The new machine, the first outside the PDP-1 mould, was introduced at WESTCON on August 11, 1963. A 1964 ad expressed the main advantage of the PDP-5, "Now you can own the PDP-5 computer for what a core memory alone used to cost: $ 27,000". 116 PDP-5s were produced until

3146-634: A successor to the PDP-10 mainframe, and instead focused on promoting the VAX as the single computer architecture for the company. Supporting the VAX's success was the VT52 , one of the most successful smart terminals . Building on earlier less successful models, the VT05 and VT50 , the VT52 was the first terminal that did everything one might want in a single inexpensive chassis. The VT52

3267-424: A tableau of real-world objects that have vexed programmers' attempts to render them realistically. Dynamic exhibits included: A Window full of Polygons depicting the view of downtown Boston that visitors see from the gallery on a large pen-plotter that renders the buildings' silhouettes with changing colors and patterns; an interactive Koch snowflake fractal generator; and the first computer game SPACEWAR! running on

3388-440: A turn to use the stripped-down TX-0, while largely ignoring a faster IBM machine that was also available. The two decided that the draw of interactive computing was so strong that they felt there was a market for a small machine dedicated to this role, essentially a commercialized TX-0. They could sell this to users where the graphical output or real-time operation would be more important than outright performance. Additionally, as

3509-411: A variety of special events, mostly relating to recreational computing. Examples included computer chess tournaments, partial Turing tests, World Micromouse Contest, Core War contests, Computer Animation Festival, The First Internet Auction, and the 25th Anniversary of Computer Games. Digital Equipment Corporation Digital Equipment Corporation ( DEC / d ɛ k / ), using

3630-607: Is most famous as the machine for which the Unix operating system was originally written. Unix ran only on DEC systems until the Interdata 8/32 . A more dramatic upgrade to the PDP-1 series was introduced in August 1966, the PDP-9 . The PDP-9 was instruction-compatible with the PDP-4 and −7, but ran about twice as fast as the −7 and was intended to be used in larger deployments. At only $ 19,900 in 1968,

3751-512: Is no reason for any individual to have a computer in his home." Unsurprisingly, DEC did not put much effort into the microcomputer area in the early days of the market. In 1977, the Heathkit H11 was announced; a PDP-11 in kit form. At the beginning of the 1980s, DEC built the VT180 (codenamed "Robin"), which was a VT100 terminal with an added Z80 -based microcomputer running CP/M , but this product

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3872-829: The IEEE John von Neumann Medal , in 1992. His other awards include Fellow of the Computer History Museum , the AeA Inventor Award, the Vladimir Karapetoff Outstanding Technical Achievement Award of Eta Kappa Nu , and the 1991 National Medal of Technology by President George H. W. Bush . He was also named an Eta Kappa Nu Eminent Member in 2007. In 1993, Worcester Polytechnic Institute awarded Bell an Honorary Doctor of Engineering, and in 2010, Bell received an honorary Doctor of Science and Technology degree from Carnegie Mellon University . The latter award referred to him as "the father of

3993-454: The MIT Media Lab , The Computer Museum launched The Computer Clubhouse in 1993 to provide children from under-served inner city communities access to computers to learn how to use and program computers. Guided by adult mentors, children engaged in projects such as developing simulations, building and programming robots, and creating computer games. Spurred by a major grant from Intel Corp.,

4114-488: The Mariner 4 Mars probe (1965). Static exhibits included a display of early computer graphic input and output devices, examples of digital typography, and a holographic animation of U.S. demographic evolution. Computer graphics Static exhibits included a display of early computer graphic input and output devices, examples of digital typography, the holographic animation American Graph Fleeting and A Visualizer's Bestiary ,

4235-667: The National Academy of Sciences (2007), and Fellow of the Australian Academy of Technological Sciences and Engineering (2009). He is also a member of the advisory board of TTI/Vanguard and a former member of the Sector Advisory Committee of Australia's Information and Communication Technology Division of the Commonwealth Scientific and Industrial Research Organisation . Bell was the first recipient of

4356-507: The PDP-5 and PDP-11 Unibus and General Registers architecture. After DEC, Bell went to Carnegie Mellon University in 1966 to teach computer science . He returned to DEC in 1972 as vice-president of engineering, where he was in charge of the successful VAX computer. Bell reportedly later came to find work at DEC stressful, and suffered a heart attack in March 1983. After he recovered and shortly after he returned to work, he resigned from

4477-704: The SAGE system for the US Air Force , which used large screens and light guns to allow operators to interact with radar data stored in the computer. When the Air Force project wound down, the Lab turned their attention to an effort to build a version of the Whirlwind using transistors in place of vacuum tubes . In order to test their new circuitry, they first built a small 18-bit machine known as TX-0 , which first ran in 1956. When

4598-678: The Stanford Cart , the quadruped Titan III from the Tokyo Institute of Technology, and a Denning Mobile Robot; robot arms included Unimate I, the Rancho and Stanford Arms and Orm from Stanford, the Direct Drive Arm-1 from Carnegie Mellon University, and the Tentacle Arm from MIT. A two-story-high model of a personal computer, simulated to be working interactively. The purpose of the exhibit

4719-513: The minicomputer market starting in the early 1960s. The company produced a series of machines known as the PDP line, with the PDP-8 and PDP-11 being among the most successful minis in history. Their success was only surpassed by another DEC product, the late-1970s VAX "supermini" systems that were designed to replace the PDP-11. Although a number of competitors had successfully competed with Digital through

4840-399: The trademark Digital , was a major American company in the computer industry from the 1960s to the 1990s. The company was co-founded by Ken Olsen and Harlan Anderson in 1957. Olsen was president until he was forced to resign in 1992, after the company had gone into precipitous decline. The company produced many different product lines over its history. It is best known for the work in

4961-802: The "11" architecture was soon the industry leader, propelling DEC back to a strong market position. The design was later expanded to allow paged physical memory and memory protection features, useful for multitasking and time-sharing . Some models supported separate instruction and data spaces for an effective virtual address size of 128 KB within a physical address size of up to 4 MB. Smaller PDP-11s, implemented as single-chip CPUs, continued to be produced until 1996, by which time over 600,000 had been sold. The PDP-11 supported several operating systems, including Bell Labs ' new Unix operating system as well as DEC's DOS-11 , RSX-11 , IAS, RT-11 , DSM-11, and RSTS/E . Many early PDP-11 applications were developed using standalone paper-tape utilities. DOS-11

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5082-539: The "Digital Laboratory Module" line. The Modules consisted of a number of individual electronic components and germanium transistors mounted to a circuit board , the actual circuits being based on those from the TX-2. The Laboratory Modules were packaged in an extruded aluminum housing, intended to sit on an engineer's workbench, although a rack-mount bay was sold that held nine laboratory modules. They were then connected together using banana plug patch cords inserted at

5203-439: The "sandbox" for a rising generation of engineers and computer scientists. Large numbers of PDP-11/70s were deployed in telecommunications and industrial control applications. AT&T Corporation became DEC's largest customer. RT-11 provided a practical real-time operating system in minimal memory, allowing the PDP-11 to continue DEC's critical role as a computer supplier for embedded systems . Historically, RT-11 also served as

5324-433: The 1950s, wiped out when new technical developments rendered their platforms obsolete, and even large companies like RCA and General Electric were failing to make a profit in the market. The only serious expression of interest came from Georges Doriot and his American Research and Development Corporation (AR&D). Worried that a new computer company would find it difficult to arrange further financing, Doriot suggested

5445-399: The 1970s, the VAX cemented the company's place as a leading vendor in the computer space. As microcomputers improved in the late 1980s, especially with the introduction of RISC -based workstation machines, the performance niche of the minicomputer was rapidly eroded. By the early 1990s, the company was in turmoil as their mini sales collapsed and their attempts to address this by entering

5566-562: The 1980s, culminating in the NVAX microprocessor implementation and VAX 7000/10000 series in the early 1990s. When a DEC research group demonstrated two prototype microcomputers in 1974—before the debut of the MITS Altair —Olsen chose to not proceed with the project. The company similarly rejected another personal computer proposal in 1977. At the time these systems were of limited utility, and Olsen famously derided them in 1977, stating "There

5687-613: The 1982 ACM SIGGRAPH conference, Martin Newell donated his original teapot to Oliver Strimpel, wryly noting the symbolism of one Englishman giving another Englishman a teapot to be preserved and displayed a stone's throw from the site of the Boston Tea Party revolt of 1773. The exhibit displayed Allan Newell's original ceramic teapot alongside an Adage frame buffer display of a Bézier model of it, both responding interactively to changes in lighting selected by museum visitors with switches. Computer animation , an animation theater performed

5808-406: The 1990s. The birth of electronic computer milestone featured a piece of the 1951 Whirlwind I computer with an interactive exhibit explaining core memory. Machines for big business were exemplified by a UNIVAC I installation and an IBM System 360. The emergence of computer programming languages was featured in a milestone showing how for the first time, different computers were programmed to accept

5929-726: The ACM Gordon Bell Prize (administered by the ACM and IEEE) in 1987 to encourage development in parallel processing . The first Gordon Bell Prize was won by researchers at the Parallel Processing Division of Sandia National Laboratory for work done on the 1000-processor nCUBE 10 hypercube . He was a founding member of Ardent Computer in 1986, becoming VP of R&D in 1988, and remained until it merged with Stellar in 1989, to become Stardent Computer . Between 1991 and 1995, Bell advised Microsoft in its efforts to start

6050-447: The CPU which allowed one to easily see the logic modules plugged into the wire-wrapped backplane of the CPU. Sold standard with 4 kWords of 12-bit core memory and a Teletype Model 33 ASR for basic input/output, the machine listed for only $ 18,000. The PDP-8 is referred to as the first real minicomputer because of its sub-$ 25,000 price. Sales were, unsurprisingly, very strong, and helped by

6171-508: The PC, but was more expensive than, and completely incompatible with IBM PC hardware and software, offering far fewer options for customizing a system. Unlike CP/M and DOS microcomputers, every copy of every program for the Professional had to be provided with a unique key for the particular machine and CPU for which it was bought. At that time this was mainstream policy, because most computer software

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6292-612: The PDP-8, all in software. Although not a huge seller, 142 LINC-8s were sold starting at $ 38,500. Like the original LINC to PDP-5 evolution, the LINC-8 was then modified into the single-processor PDP-12 , adding another 1000 machines to the 12-bit family. Newer circuitry designs led to the PDP-8/I and PDP-8/L in 1968. In 1975, one year after an agreement between DEC and Intersil , the Intersil 6100 chip

6413-455: The PDP-9 was a big seller, eventually selling 445 machines, more than all of the earlier models combined. Even while the PDP-9 was being introduced, its replacement was being designed, and was introduced as 1969's PDP-15 , which re-implemented the PDP-9 using integrated circuits in place of modules. Much faster than the PDP-9 even in basic form, the PDP-15 also included a floating point unit and

6534-494: The PMS classification. The Transducer category was also added to cover input/output devices. The museum actively collected artifacts throughout its history, though acquisition criteria became more selective over time owing to increasingly adherence to collecting criteria and severely limited storage space. Acquired artifacts ranged in size from a single chip to the multiple components of a single mainframe computer. In addition to artifacts,

6655-688: The Professional was a superior machine, running inferior software. In addition, a new user would have to learn an awkward, slow, and inflexible menu-based user interface which appeared to be radically different from PC DOS or CP/M , which were more commonly used on the 8080- and 8088-based microcomputers of the time. A second offering, the DECmate II was the latest version of the PDP-8-based word processors, but not really suited to general computing, nor competitive with Wang Laboratories ' popular word processing equipment. The most popular early DEC microcomputer

6776-506: The Rainbow, and in its standard form was the first widely marketed diskless workstation . In 1984, DEC launched its first 10 Mbit/s Ethernet . Ethernet allowed scalable networking, and VAXcluster allowed scalable computing. Combined with DECnet and Ethernet-based terminal servers ( LAT ), DEC had produced a networked storage architecture which allowed them to compete directly with IBM. Ethernet replaced Token Ring , and went on to become

6897-485: The System Modules to build their "Memory Test" machine for testing core memory systems, selling about 50 of these pre-packaged units over the next eight years. The PDP-1 and LINC computers were also built using System Modules (see below). Modules were part of DEC's product line into the 1970s, although they went through several evolutions during this time as technology changed. The same circuits were then packaged as

7018-465: The TX-0 successfully proved the basic concepts, attention turned to a much larger system, the 36-bit TX-2 with a then-enormous 64 kWords of core memory . Core was so expensive that parts of TX-0's memory were stripped for the TX-2, and what remained of the TX-0 was then given to MIT on permanent loan. At MIT, Ken Olsen and Harlan Anderson noticed something odd: students would line up for hours to get

7139-684: The US, he worked in the MIT Speech Computation Laboratory under Professor Ken Stevens , where he wrote the first analysis by synthesis program. The DEC founders Ken Olsen and Harlan Anderson recruited him for their new company in 1960, where he designed the I/O subsystem of the PDP-1 , including the first UART . Bell was the architect of the PDP-4 , and PDP-6 . Other architectural contributions were to

7260-436: The ability to address more memory, often by extending the address format to 18 or 24-bits in machines were otherwise similar to their earlier 16-bit designs. In contrast, DEC decided to make a more radical departure. In 1976, they began the design of a machine whose entire architecture was expanded from the 16-bit PDP-11 to a new 32-bit basis. This would allow the addressing of very large memories, which were to be controlled by

7381-505: The adoption of "\" for pathnames in MS-DOS and Microsoft Windows as opposed to "/" in Unix . The evolution of the PDP-11 followed earlier systems, eventually including a single-user deskside personal computer form, the MicroPDP-11. In total, around 600,000 PDP-11s of all models were sold, and a wide variety of third-party peripheral vendors had also entered the computer product ecosystem. It

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7502-508: The basis for the new design, although when they first viewed the proposal, management was not impressed and almost cancelled it. The result was the PDP-11 , released in 1970. It differed from earlier designs considerably. In particular, the new design did not include many of the addressing modes that were intended to make programs smaller in memory, a technique that was widely used on other DEC machines and CISC designs in general. This would mean

7623-447: The better-established vendors like IBM or Honeywell , in spite of its low cost around $ 300,000. Only 23 were sold, or 26 depending on the source, and unlike other models the low sales meant the PDP-6 was not improved with successor versions. However, the PDP-6 is historically important as the platform that introduced "Monitor", an early time-sharing operating system that would evolve into

7744-509: The board: Kenneth H. Olsen (1982–1984), John William Poduska Sr. (1984–1988), Gardner C. Hendrie (1988–1993), Charles A. Zraket (1993–1997), and Lawrence Weber (1997–2000). The museum's collections were jump-started with the collections of Gordon and Gwen Bell, who had been actively collecting since the 1970s. To bring structure and discipline to collecting efforts, an acquisitions policy was developed in which computing materials were classified into Processor, Memory, and Switch categories, known as

7865-556: The company in the summer. Afterwards, he founded Encore Computer , one of the first shared memory, multiple-microprocessor computers to use the snooping cache structure. During the 1980s he became involved with public policy, becoming the first and founding Assistant Director of the CISE Directorate of the NSF , and led the cross-agency group that specified the NREN . Bell also established

7986-483: The company's Vice President of Engineering from 1972–1983, overseeing development of the VAX computer systems. Bell's later career included roles as an entrepreneur, investor, founding Assistant Director of NSF's Computing and Information Science and Engineering Directorate from 1986–1987, and researcher emeritus at Microsoft Research from 1995–2015. Gordon Bell was born in Kirksville, Missouri . He grew up helping with

8107-698: The company's first computer, the PDP-1 . In keeping with Doriot's instructions, the name was an initialism for " Programmable Data Processor ", leaving off the term "computer". As Gurley put it, "We aren't building computers, we're building 'Programmable Data Processors'." The prototype was first shown publicly at the Joint Computer Conference in Boston in December 1959. The first PDP-1 was delivered to Bolt, Beranek and Newman in November 1960, and formally accepted

8228-411: The compatible DECSYSTEM-20 , along with a TOPS-20 operating system that included virtual memory support. The Jupiter Project was supposed to continue the mainframe product line into the future by using gate arrays with an innovative Air Mover Cooling System, coupled with a built-in floating point processing engine called "FBOX". The design was intended for a top tier scientific computing niche, yet

8349-450: The computer HAL's natural language capability in an excerpt of the Stanley Kubrick film 2001: A Space Odyssey . Robot sensing Museum visitors could interact with four robot sensing modalities: vision, hearing, touch, and sonar. Vision: after arranging a set of simple shapes on a board, a vision system attempted to recognize them using edge detection. Hearing: this was exemplified by a speech recognition system. Touch: visitors touch

8470-443: The computer industry", "an architect of our digital age", and "father of the minicomputer". Bell was elected a member of the National Academy of Engineering in 1977 for contributions to the architecture of minicomputers. He is also a Fellow of the American Academy of Arts and Sciences (1994), American Association for the Advancement of Science (1983), Association for Computing Machinery (1994), IEEE (1974), and member of

8591-421: The critical performance measurement was based upon COBOL compilation which did not fully utilize the primary design features of Jupiter technology. When the Jupiter Project was cancelled in 1983, some of the engineers adapted aspects of the 36-bit design into a forthcoming 32-bit design, releasing the high-end VAX8600 in 1985. DEC's successful entry into the computer market took place during a fundamental shift in

8712-577: The development of the Smart Machines gallery, robot collecting was especially active, with robots such as Carnegie Mellon University Robotics Institute's Direct Drive Arm I and Pluto Rover, GM Consight-I Project materials, Johns Hopkins University Adaptive Machines Group's Beast, Naval Systems International Sea Rover, and Rehabilitation Institute of Pittsburgh Page Turning Robot. The collections of Subassemblies and Components, Memories, Calculating Devices and Transducers continued to expand as well. Spurred by

8833-524: The difficulty of preserving a fast-evolving technology built by future-oriented engineers and entrepreneurs, the museum signed a joint collecting agreement with the Smithsonian Institution, National Museum of American History to collectively ensure that important computing artifacts would be preserved. Under this 1987 agreement, a common catalog and database of both museums' collections would be created. In addition to exhibits principally directed to

8954-415: The dominant networking model in use today. In September 1985, DEC became the fifth company to register a .com domain name (dec.com). Gordon Bell Chester Gordon Bell (August 19, 1934 – May 17, 2024) was an American electrical engineer and manager. An early employee of Digital Equipment Corporation (DEC), from 1960–1966, Bell designed several of their PDP machines and later served as

9075-509: The earliest machines to John V. Blankenbaker for the Kenbak-1 (1972), Robert Pond for the Altair 8800, Lee Felsenstein for the prototype VDM-1 , Don Lancaster for the prototype TVT-1, and Thi T. Truong for the Micral. In 1986–7, the museum acquired 27 computers, including a CDC 1604, MIT AI Lab CADR, MIT Lincoln Lab LINC, Prime Computer Model 300, Research Machines 380Z, and a Xerox Alto II. As part of

9196-468: The fact that several competitors had just entered the market with machines aimed directly at the PDP-5's market space, which the PDP-8 trounced. This gave the company two years of unrestricted leadership, and eventually 1450 "straight eight" machines were produced before it was replaced by newer implementations of the same basic design. DEC hit an even lower price-point with the PDP-8/S, the S for "serial". As

9317-619: The family business, Bell Electric, repairing appliances and wiring homes. Bell received a BS (1956), and MS (1957) in electrical engineering from MIT . He then went to the New South Wales University of Technology (now UNSW) in Australia on a Fulbright Scholarship in 1957–58, where he taught classes on computer design, programmed one of the first computers to arrive in Australia (called UTECOM, an English Electric DEUCE ), and published his first academic paper. Returning to

9438-475: The first "R" (red) series " Flip-Chip " modules. Later, other Flip-Chip module series provided additional speed, much higher logic density, and industrial I/O capabilities. DEC published extensive data about the modules in free catalogs that became very popular. With the company established and a successful product on the market, DEC turned its attention to the computer market once again as part of its planned "Phase II". In August 1959, Ben Gurley started design of

9559-487: The fledgling company change its business plan to focus less on computers, and even change their name from "Digital Computer Corporation". The pair returned with an updated business plan that outlined two phases for the company's development. They would start by selling computer modules as stand-alone devices that could be purchased separately and wired together to produce a number of different digital systems for lab use. Then, if these "digital modules" were able to build

9680-583: The form of a live and televised (usually on Stewart Cheifet 's PBS series Computer Chronicles ) computer trivia contest between East and West Coast teams of industry and academic leaders, modeled somewhat on the College Bowl format. Between 1988 and the last Bowl held in 1998, team members included Marc Andreessen, John Doerr, Esther Dyson, Bill Gates, William "Bill" Joy, Mitchell Kapor, John Markoff, Patrick McGovern, Walt Mossberg, Nathan Myhrvold, Nicholas Negroponte, and John William Poduska. The museum hosted

9801-548: The founding and operation of the museum from the Internet Archive , the Computer History Museum , Gordon Bell and Gwen Bell , and Gardner Hendrie. An illustrated timeline weaves the sections together to provide an overview. The Computer Museum was governed by a Board of Directors, which appointed the executive director and various board committees to oversee operations and other areas such as collections, exhibits, education, and development. The following served as chairman of

9922-411: The front of the modules. Three versions were offered, running at 5 MHz (1957), 500 kHz (1959), or 10 MHz (1960). The Modules proved to be in high demand by other computer companies, who used them to build equipment to test their own systems. Despite the recession of the late 1950s, the company sold $ 94,000 worth of these modules during 1958 alone (equivalent to $ 992,700 in 2023), turning

10043-489: The giant chassis, visitors walked between a wall-sized graphics card and memory card to the microprocessor, upon which a projected electron microscope imagery of a CPU's circuits in operation appeared. Further on, a RAM set of modules plugged into the motherboard included reveals showing electron microscope imagery of memory circuits, Peering into a mini-van sized hard drive, visitors could see read/write heads position themselves on either side of rotating platters. Richard Fowler

10164-503: The high-end market with machines like the VAX 9000 were market failures. After several attempts to enter the workstation and file server market, the DEC Alpha product line began to make successful inroads in the mid-1990s, but was too late to save the company. DEC was acquired in June 1998 by Compaq in what was at that time the largest merger in the history of the computer industry. During

10285-481: The history of computing, the museum re-opened in 1984 with a 4,000-square-foot gallery on digital image processing and computer graphics, entitled The Computer and the Image. The exhibits addressed the history of the field, the basic principles of digital image processing and image synthesis, and applications of the technologies. The exhibition featured historical artifacts, explanatory text and images, interactive exhibits, and

10406-539: The history of computing. First called The Computer Museum History Center, it was housed in a storage building near Hangar One at Moffett Field , California . In 2001, it changed its name to the Computer History Museum and acquired its own building in Mountain View, California , in 2002. In 1999, the Computer Museum merged with the Museum of Science, Boston . When the museum closed as an independent entity in 2000,

10527-413: The inspiration for many microcomputer OS's, as these were generally being written by programmers who cut their teeth on one of the many PDP-11 models. For example, CP/M used a command syntax similar to RT-11's, and even retained the awkward PIP program used to copy data from one computer device to another. As another historical footnote, DEC's use of "/" for "switches" (command-line options) would lead to

10648-485: The lab's various computer projects. The Lab is best known for their work on what would today be known as "interactivity", and their machines were among the first where operators had direct control over programs running in real-time. These had started in 1944 with the famed Whirlwind , which was originally developed to make a flight simulator for the US Navy , although this was never completed. Instead, this effort evolved into

10769-537: The limited information available, they used it to process radar cross section data for the Lockheed A-12 reconnaissance aircraft . Gordon Bell remembered that it was being used in Oregon some time later, but could not recall who was using it. In November 1962, DEC introduced the $ 65,000 PDP-4 . The PDP-4 was similar to the PDP-1 and used a similar instruction set, but used slower memory and different packaging to lower

10890-441: The lines were shut down in early 1967. Like the PDP-1 before it, the PDP-5 inspired a series of newer models based on the same basic design that would go on to be more famous than its parent. On March 22, 1965, DEC introduced the PDP-8 , which replaced the PDP-5's modules with the new R-series modules using Flip Chips. The machine was re-packaged into a small tabletop case, which remains distinctive for its use of smoked plastic over

11011-491: The machine would cost much less than the larger systems then available, it would also be able to serve users that needed a lower-cost solution dedicated to a specific task, where a larger 36-bit machine would not be needed. In 1957, when the pair and Ken's brother Stan sought capital, they found that the American business community was hostile to investing in computer companies. Many smaller computer companies had come and gone in

11132-438: The machine would spend more time accessing memory, which would slow it down. However, the machine also extended the idea of multiple "General Purpose Registers" (GPRs), which gave the programmer flexibility to use these high-speed memory caches as they needed, potentially addressing the performance issues. A major advance in the PDP-11 design was DEC's Unibus , which supported all peripherals through memory mapping . This allowed

11253-411: The minicomputer". Bell co-founded The Computer Museum in Boston, Massachusetts, with his wife Gwen Bell in 1979. He was a founding board member of its successor, the Computer History Museum located in Mountain View, California . In 2003, he was made a Fellow of the Museum "for his key role in the minicomputer revolution, and for contributions as a computer architect and entrepreneur". The story of

11374-665: The museum collected images, film, and video. Noteworthy early acquisitions included parts of Whirlwind 1, UNIVAC 1, the TX-0, a CPU from the Burroughs ILLIAC IV, IBM 7030 "Stretch", NASA Apollo Guidance Computer Prototype, a CDC 6600, a CRAY-1, PDP-1, PDP-8, EDSAC Storage Tube, Colossus pulley, and components of the Ferranti Atlas, and the Manchester Mark I. In June 1984, the collection of artifacts and films numbered 900 cataloged items. Examples of acquisitions of computers in

11495-425: The name implies the /S used a serial arithmetic unit, which was much slower but reduced costs so much that the system sold for under $ 10,000. DEC then used the new PDP-8 design as the basis for a new LINC, the two-processor LINC-8 . The LINC-8 used one PDP-8 CPU and a separate LINC CPU, and included instructions to switch from one to the other. This allowed customers to run their existing LINC programs, or "upgrade" to

11616-458: The next April. The PDP-1 sold in basic form for $ 120,000 (equivalent to $ 9,269,291 in 2023). By the time production ended in 1969, 53 PDP-1s had been delivered. The PDP-1 was supplied standard with 4096 words of core memory , 18-bits per word, and ran at a basic speed of 100,000 operations per second. It was constructed using many System Building Blocks that were packaged into several 19-inch racks . The racks were themselves packaged into

11737-513: The pioneering Whirlwind Computer, the SAGE computer room , an evolutionary series of computers built by Seymour Cray , and a 20-year timeline of computing developments that included many artifacts collected by Gordon Bell. Also among the opening exhibits was a permanent gallery devoted to the history, technology, and applications of digital imaging entitled The Computer and the Image. Prior to all of this, DEC's Ken Olsen and Mitre Corporation 's Robert Everett had, in 1973, "saved Whirlwind from

11858-658: The preceding year included an Apple 1, Burroughs B-500, Digital Equipment Corp. PDP-1, Franklin Ace 100, and IBM SAGE: AN/FSQ-7 components. Several types of memory were acquired, including core memory, plasma cell memory, rope memory, selectron tube, magnetic cards, mercury delay line, and fixed-head drum. In the following years noteworthy acquisitions of computers included: Amdahl 470V/6, Apollo Domain DN100 workstation, Control Data Little Character, Data General Eclipse, Evans & Sutherland Line Drawing System-2, Osborne 1, SCELBI 8H minicomputer, and

11979-448: The price of a crate of strawberries, a computer composition system, and a system that plays tic-tac-toe according to a visitor-selected strategy. Natural language understanding Visitors could sit at computers and ask questions of ELIZA , the automated psychotherapist that was noteworthy because despite its basic rule-based behavior, users became deeply engaged with it. In an interactive video disk system, visitors were invited to analyze

12100-568: The price. Like the PDP-1, about 54 PDP-4s were eventually sold, most to a customer base similar to the original PDP-1. In 1964, DEC introduced its new Flip Chip module design, and used it to re-implement the PDP-4 as the PDP-7 . The PDP-7 was introduced in December 1964, and about 120 were eventually produced. An upgrade to the Flip Chip led to the R series, which in turn led to the PDP-7A in 1965. The PDP-7

12221-705: The purchase, some parts of DEC were sold to other companies; the compiler business and the Hudson Fab were sold to Intel . At the time, Compaq was focused on the enterprise market and had recently purchased several other large vendors. DEC was a major player overseas where Compaq had less presence. However, Compaq had little idea what to do with its acquisitions, and soon found itself in financial difficulty of its own. Compaq subsequently merged with Hewlett-Packard (HP) in May 2002. Ken Olsen and Harlan Anderson were two engineers who had been working at MIT Lincoln Laboratory on

12342-591: The same design. During construction of the prototype PDP-1, some design work was carried out on a 24-bit PDP-2, and the 36-bit PDP-3. Although the PDP-2 never proceeded beyond the initial design, the PDP-3 found some interest and was designed in full. Only one PDP-3 appears to have been built, in 1960, by the CIA's Scientific Engineering Institute (SEI) in Waltham, Massachusetts . According to

12463-561: The scrap heap" and "arranged to exhibit it at the Smithsonian ." Olsen began warehousing other old computers, even as the Bells, independently, "were thinking about a computer museum" and collecting artifacts. While the majority of the museum's energies and funding were focused on the growing exhibitions and educational programs, the resources available for the historical collections remained flat. Though active collection of artifacts continued, there

12584-591: The simulated fishtank. Once in the tank, the fish behaved according to the behavioral rules chosen during its design, with surprising results. Together with a set of interactive stations, the exhibit, created in conjunction with the MIT Media Lab and Nearlife, Inc., aimed to reveal how simple behavioral rules lead to distinctive emergent behavior in complex systems such as traffic flows and city demographic distributions. The museum developed temporary exhibits, some of which traveled to other museums. In collaboration with

12705-485: The underlying organization of the machines from word lengths based on 6-bit characters to those based on 8-bit words needed to support ASCII . DEC began studies of such a machine, the PDP-X, but Ken Olsen did not support it as he could not see how it offered anything their existing 12-bit or 18-bit machines didn't. This led the leaders of the PDP-X project to leave DEC and start Data General , whose 16-bit Data General Nova

12826-463: The widely used TOPS-10 . When newer Flip Chip packaging allowed the PDP-6 to be re-implemented at a much lower cost, DEC took the opportunity to refine their 36-bit design, introducing the PDP-10 in 1968. The PDP-10 was as much a success as the PDP-6 was a commercial failure; about 700 mainframe PDP-10s were sold before production ended in 1984. The PDP-10 was widely used in university settings, and thus

12947-426: Was 89. Bell's law of computer classes was first described in 1972 with the emergence of a new, lower priced microcomputer class based on the microprocessor. Established market class computers are introduced at a constant price with increasing functionality and performance. Technology advances in semiconductors, storage, interfaces and networks enable a new computer class (platform) to form about every decade to serve

13068-537: Was a lack of suitable collections storage and study space. Furthermore, with the inexorable shift of the U.S. computer industry from Boston to the West Coast, the museum's Boston location became a handicap from the point of view of collecting as well as industry support. In 1996, a group of Computer Museum Board members established a division of the museum in Silicon Valley exclusively devoted to collecting and preserving

13189-469: Was either bought from the company that built the computer or custom-constructed for one client. However, the emerging third-party software industry disregarded the PDP-11/Professional line and concentrated on other microcomputers where distribution was easier. At DEC itself, creating better programs for the Professional was not a priority, perhaps from fear of cannibalizing the PDP-11 line. As a result,

13310-507: Was even sold in kit form as the Heathkit H11 , although it proved too expensive for Heathkit 's traditional hobbyist market. The introduction of semiconductor memory in the early 1970s, and especially dynamic RAM shortly thereafter, led to dramatic reductions in the price of memory as the effects of Moore's Law were felt. Within years, it was common to equip a machine with all the memory it could address, typically 64 KB on 16-bit machines. This led vendors to introduce new designs with

13431-618: Was eventually ported along with MS-DOS 2.0 and introduced in late 1983. Although the Rainbow generated some press, it was unsuccessful due to its high price and lack of marketing and sales support. By late 1983 IBM was outselling DEC's personal computers by more than ten to one. A further system was introduced in 1986 as the VAXmate , which included Microsoft Windows 1.0 and used VAX/VMS-based file and print servers along with integration into DEC's own DECnet -family, providing LAN/WAN connection from PC to mainframe or supermini. The VAXmate replaced

13552-628: Was followed by the even more successful VT100 and its follow-ons, making DEC one of the largest terminal vendors in the industry. This was supported by a line of inexpensive computer printers , the DECwriter line. With the VT and DECwriter series, DEC could now offer a complete top-to-bottom system from computer to all peripherals, which formerly required collecting the required devices from different suppliers. The VAX processor architecture and family of systems evolved and expanded through several generations during

13673-709: Was initially available only to DEC employees. It was only after IBM had successfully launched the IBM PC in 1981 that DEC responded with their own systems. In 1982, DEC introduced not one, but three incompatible machines which were each tied to different proprietary architectures. The first, the DEC Professional , was based on the PDP-11/23 (and later, the 11/73) running the RSX-11M+ derived, but menu-driven, P/OS ("Professional Operating System"). This DEC machine easily outperformed

13794-493: Was launched, effectively a PDP-8 on a chip. This was a way to allow PDP-8 software to be run even after the official end-of-life announcement for the DEC PDP-8 product line. While the PDP-5 introduced a lower-cost line, 1963's PDP-6 was intended to take DEC into the mainframe market with a 36-bit machine. However, the PDP-6 proved to be a "hard sell" with customers, as it offered few obvious advantages over similar machines from

13915-402: Was recruited from The Science Museum, London/Bradford, as exhibit designer. The exhibit garnered international publicity and more than doubled visitor traffic to the museum. Through a series of nine milestones portrayed with vignettes and interactive exhibits, this permanent exhibit portrayed computing from the punched card machines of the 1930s through the ubiquitous embedded microprocessors of

14036-535: Was released in 1969 and was a huge success. The success of the Nova finally prompted DEC to take the switch seriously, and they began a crash program to introduce a 16-bit machine of their own. The new system was designed primarily by Harold McFarland, Gordon Bell , Roger Cady, and others. The project was able to leap forward in design with the arrival of Harold McFarland, who had been researching 16-bit designs at Carnegie Mellon University . One of his simpler designs became

14157-404: Was the PDP-11's first disk operating system, but was soon supplanted by more capable systems. RSX provided a general-purpose multitasking environment and supported a wide variety of programming languages . IAS was a time-sharing version of RSX-11D. Both RSTS and Unix were time-sharing systems available to educational institutions at little or no cost, and these PDP-11 systems were destined to be

14278-454: Was the basis of many advances in computing and operating system design during the 1970s. DEC later re-branded all of the models in the 36-bit series as the "DECsystem-10", and PDP-10s are generally referred to by the model of their CPU, starting with the "KA10", soon upgraded to the "KI10" (I:Integrated circuit); then to "KL10" (L:Large-scale integration ECL logic ); also the "KS10" (S: Small form factor ). Unified product line upgrades produced

14399-528: Was the dual-processor (Z80 and 8088) Rainbow 100 , which ran the 8-bit CP/M operating system on the Z80 and the 16-bit CP/M-86 operating system on the Intel 8088 processor. It could also run a UNIX System III implementation called VENIX . Applications from standard CP/M could be re-compiled for the Rainbow, but by this time users were expecting custom-built (pre-compiled binary) applications such as Lotus 1-2-3 , which

14520-447: Was to show the anatomy of a computer and to explain how the various parts work and communicate with each other. Before entering the computer's chassis, visitors could roll a giant trackball to play "World Traveller" on the giant screen. Wall-sized graphics by David Macaulay and interactive exhibits explained how all kinds of information, from text, graphics, video, music, as well as computer programs can be represented as 1's and 0's. Inside

14641-441: Was used as a printer . The Soroban system was notoriously unreliable, and often replaced with a modified Friden Flexowriter , which also contained its own punched tape system. A variety of more-expensive add-ons followed, including magnetic tape systems, punched card readers and punches, and faster punched tape and printer systems. When DEC introduced the PDP-1, they also mentioned larger machines at 24, 30 and 36 bits, based on

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