A word processor ( WP ) is a device or computer program that provides for input, editing, formatting, and output of text, often with some additional features.
57-547: DDK abbreviation may refer to: In software development , a Driver Development Kit , including Microsoft Windows Driver Development Kit In hull codes of United States Navy, an abolished surface combatant warship category ' Hunter-Killer Destroyer ' In medical signs , Dysdiadochokinesia , a type of cerebellar ataxia In molecular biology , Cdc7/Dbf4 kinase , or Dbf4-dependent kinase, — protein kinase required for initiation of eukaryotic DNA replication . In snooker ,
114-801: A software solution to satisfy a user . The process is more encompassing than programming , writing code , in that it includes conceiving the goal, evaluating feasibility, analyzing requirements , design , testing and release . The process is part of software engineering which also includes organizational management , project management , configuration management and other aspects. Software development involves many skills and job specializations including programming , testing , documentation , graphic design , user support , marketing , and fundraising . Software development involves many tools including: compiler , integrated development environment (IDE), version control , computer-aided software engineering , and word processor . The details of
171-414: A "literary piano". The only "word processing" these mechanical systems could perform was to change where letters appeared on the page, to fill in spaces that were previously left on the page, or to skip over lines. It was not until decades later that the introduction of electricity and electronics into typewriters began to help the writer with the mechanical part. The term “word processing” (translated from
228-456: A Dreaded Double Kiss, coined by Dennis Taylor DDK, the National Rail station code for Dagenham Dock railway station , London, England Daniel Dae Kim (born 1968), South Korean-born American actor Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title DDK . If an internal link led you here, you may wish to change
285-640: A computer-based word processing dedicated device with Japanese writing system in Business Show in Tokyo. Toshiba released the first Japanese word processor JW-10 [ jp ] in February 1979. The price was 6,300,000 JPY, equivalent to US$ 45,000. This is selected as one of the milestones of IEEE . The Japanese writing system uses a large number of kanji (logographic Chinese characters) which require 2 bytes to store, so having one key per each symbol
342-412: A deadline. Software analysis begins with a requirements analysis to capture the business needs of the software. Challenges for the identification of needs are that current or potential users may have different and incompatible needs, may not understand their own needs, and change their needs during the process of software development. Ultimately, the result of analysis is a detailed specification for
399-622: A fully functioned desktop publishing program. While the distinction between a text editor and a word processor is clear—namely the capability of editing rich text —the distinctions between a word processor and a desktop publishing program has become unclear as word processing software has gained features such as ligature support added to the 2010 version of Microsoft Word . Common word processor programs include LibreOffice Writer , Google Docs and Microsoft Word . Word processors developed from mechanical machines, later merging with computer technology. The history of word processing
456-547: A set of stick-on "keycaps" describing the function were provided with the software. Lexitype was popular with large organizations that had previously used the Lexitron. Eventually, the price differences between dedicated word processors and general-purpose PCs, and the value added to the latter by software such as “ killer app ” spreadsheet applications, e.g. VisiCalc and Lotus 1-2-3 , were so compelling that personal computers and word processing software became serious competition for
513-452: A typewriter) was patented in 1714 by Henry Mill for a machine that was capable of "writing so clearly and accurately you could not distinguish it from a printing press". More than a century later, another patent appeared in the name of William Austin Burt for the typographer . In the late 19th century, Christopher Latham Sholes created the first recognizable typewriter, which was described as
570-500: A user to rewrite text that had been written on another tape, and it also allowed limited collaboration in the sense that a user could send the tape to another person to let them edit the document or make a copy. It was a revolution for the word processing industry. In 1969, the tapes were replaced by magnetic cards. These memory cards were inserted into an extra device that accompanied the MT/ST, able to read and record users' work. Throughout
627-511: Is a framework that provides the viewpoints on the system and its environment , to be used in the software development process . It is a graphical representation of the underlying semantics of a view. The purpose of viewpoints and views is to enable human engineers to comprehend very complex systems and to organize the elements of the problem around domains of expertise . In the engineering of physically intensive systems, viewpoints often correspond to capabilities and responsibilities within
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#1733094522994684-408: Is a popular way of managing changes made to the software. Whenever a new version is checked in, the software saves a backup of all modified files. If multiple programmers are working on the software simultaneously, it manages the merging of their code changes. The software highlights cases where there is a conflict between two sets of changes and allows programmers to fix the conflict. A view model
741-449: Is correctly incorporated with the newer software. Design involves choices about the implementation of the software, such as which programming languages and database software to use, or how the hardware and network communications will be organized. Design may be iterative with users consulted about their needs in a process of trial and error . Design often involves people expert in aspect such as database design , screen architecture, and
798-833: Is essential to success. This is more easily achieved if the team is small, used to working together, and located near each other. Communications also help identify problems at an earlier state of development and avoid duplicated effort. Many development projects avoid the risk of losing essential knowledge held by only one employee by ensuring that multiple workers are familiar with each component. Software development involves professionals from various fields, not just software programmers but also individuals specialized in testing, documentation writing, graphic design , user support, marketing , and fundraising. Although workers for proprietary software are paid, most contributors to open-source software are volunteers. Alternately, they may be paid by companies whose business model does not involve selling
855-399: Is helpful for new developers to understand the project when they begin working on it. In agile development, the documentation is often written at the same time as the code. User documentation is more frequently written by technical writers . Accurate estimation is crucial at the feasibility stage and in delivering the product on time and within budget. The process of generating estimations
912-422: Is inefficient, difficult to understand, or lacking documentation on its functionality. These standards are especially likely to break down in the presence of deadlines. As a result, testing, debugging, and revising the code becomes much more difficult. Code refactoring , for example adding more comments to the code, is a solution to improve the understandability of code. Testing is the process of ensuring that
969-591: Is infeasible. Japanese word processing became possible with the development of the Japanese input method (a sequence of keypresses, with visual feedback, which selects a character) -- now widely used in personal computers. Oki launched OKI WORD EDITOR-200 in March 1979 with this kana-based keyboard input system. In 1980 several electronics and office equipment brands including entered this rapidly growing market with more compact and affordable devices. For instance, NEC introduced
1026-440: Is often delegated by the project manager . Because the effort estimation is directly related to the size of the complete application, it is strongly influenced by addition of features in the requirements—the more requirements, the higher the development cost. Aspects not related to functionality, such as the experience of the software developers and code reusability, are also essential to consider in estimation. As of 2019 , most of
1083-432: Is often used to break down the customer's requirements into pieces that can be implemented by software programmers. The underlying logic of the program may be represented in data-flow diagrams , data dictionaries , pseudocode , state transition diagrams , and/or entity relationship diagrams . If the project incorporates a piece of legacy software that has not been modeled, this software may be modeled to help ensure it
1140-401: Is robust to heavy levels of input or usage), integration testing (to ensure that the software is adequately integrated with other software), and compatibility testing (measuring the software's performance across different operating systems or browsers). When tests are written before the code, this is called test-driven development . Production is the phase in which software is deployed to
1197-462: Is the story of the gradual automation of the physical aspects of writing and editing, and then to the refinement of the technology to make it available to corporations and Individuals. The term word processing appeared in American offices in the early 1970s centered on the idea of streamlining the work to typists, but the meaning soon shifted toward the automation of the whole editing cycle. At first,
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#17330945229941254-862: The Gypsy word processor). These were popularized by MacWrite on the Apple Macintosh in 1983, and Microsoft Word on the IBM PC in 1984. These were probably the first true WYSIWYG word processors to become known to many people. Of particular interest also is the standardization of TrueType fonts used in both Macintosh and Windows PCs. While the publishers of the operating systems provide TrueType typefaces, they are largely gathered from traditional typefaces converted by smaller font publishing houses to replicate standard fonts. Demand for new and interesting fonts, which can be found free of copyright restrictions, or commissioned from font designers, developed. The growing popularity of
1311-601: The NWP-20 [ jp ] , and Fujitsu launched the Fujitsu OASYS [ jp ] . While the average unit price in 1980 was 2,000,000 JPY (US$ 14,300), it was dropped to 164,000 JPY (US$ 1,200) in 1985. Even after personal computers became widely available, Japanese word processors remained popular as they tended to be more portable (an "office computer" was initially too large to carry around), and become commonplace for business and academics, even for private individuals in
1368-471: The programming language ). Documentation comes in two forms that are usually kept separate—that intended for software developers, and that made available to the end user to help them use the software. Most developer documentation is in the form of code comments for each file, class , and method that cover the application programming interface (API)—how the piece of software can be accessed by another—and often implementation details. This documentation
1425-406: The $ 10,000 range. Cheap general-purpose personal computers were still the domain of hobbyists. In Japan, even though typewriters with Japanese writing system had widely been used for businesses and governments, they were limited to specialists and required special skills due to the wide variety of letters, until computer-based devices came onto the market. In 1977, Sharp showcased a prototype of
1482-612: The 1960s and 70s, word processing began to slowly shift from glorified typewriters augmented with electronic features to become fully computer-based (although only with single-purpose hardware) with the development of several innovations. Just before the arrival of the personal computer (PC), IBM developed the floppy disk . In the 1970s, the first proper word-processing systems appeared, which allowed display and editing of documents on CRT screens . During this era, these early stand-alone word processing systems were designed, built, and marketed by several pioneering companies. Linolex Systems
1539-525: The German word Textverarbeitung ) itself was possibly created in the 1950s by Ulrich Steinhilper , a German IBM typewriter sales executive, or by an American electro-mechanical typewriter executive, George M. Ryan, who obtained a trademark registration in the USPTO for the phrase. However, it did not make its appearance in 1960s office management or computing literature (an example of grey literature ), though many of
1596-493: The Windows operating system in the 1990s later took Microsoft Word along with it. Originally called "Microsoft Multi-Tool Word", this program quickly became a synonym for “word processor”. Early in the 21st century, Google Docs popularized the transition to online or offline web browser based word processing. This was enabled by the widespread adoption of suitable internet connectivity in businesses and domestic households and later
1653-489: The available methodologies are best suited to specific kinds of projects, based on various technical, organizational, project, and team considerations. Another focus in many programming methodologies is the idea of trying to catch issues such as security vulnerabilities and bugs as early as possible ( shift-left testing ) to reduce the cost of tracking and fixing them. In 2009, it was estimated that 32 percent of software projects were delivered on time and budget, and with
1710-423: The code executes correctly and without errors. Debugging is performed by each software developer on their own code to confirm that the code does what it is intended to. In particular, it is crucial that the software executes on all inputs, even if the result is incorrect. Code reviews by other developers are often used to scrutinize new code added to the project, and according to some estimates dramatically reduce
1767-480: The dedicated machines and soon dominated the market. In the late 1980s, innovations such as the advent of laser printers , a "typographic" approach to word processing ( WYSIWYG - What You See Is What You Get), using bitmap displays with multiple fonts (pioneered by the Xerox Alto computer and Bravo word processing program), and graphical user interfaces such as “copy and paste” (another Xerox PARC innovation, with
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1824-587: The designers of word processing systems combined existing technologies with emerging ones to develop stand-alone equipment, creating a new business distinct from the emerging world of the personal computer. The concept of word processing arose from the more general data processing, which since the 1950s had been the application of computers to business administration. Through history, there have been three types of word processors: mechanical, electronic and software. The first word processing device (a "Machine for Transcribing Letters" that appears to have been similar to
1881-408: The end user. During production, the developer may create technical support resources for users or a process for fixing bugs and errors that were not caught earlier. There might also be a return to earlier development phases if user needs changed or were misunderstood. Software development is performed by software developers , usually working on a team. Efficient communications between team members
1938-430: The engineering organization. Fitness functions are automated and objective tests to ensure that the new developments don't deviate from the established constraints, checks and compliance controls. Intellectual property can be an issue when developers integrate open-source code or libraries into a proprietary product, because most open-source licenses used for software require that modifications be released under
1995-477: The full functionality. An additional 44 percent were delivered, but missing at least one of these features. The remaining 24 percent were cancelled prior to release. Software development life cycle refers to the systematic process of developing applications . The sources of ideas for software products are plentiful. These ideas can come from market research including the demographics of potential new customers, existing customers, sales prospects who rejected
2052-511: The ideas, products, and technologies to which it would later be applied were already well known. Nonetheless, by 1971, the term was recognized by the New York Times as a business " buzz word ". Word processing paralleled the more general "data processing", or the application of computers to business administration. Thus, by 1972, the discussion of word processing was common in publications devoted to business office management and technology; by
2109-436: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=DDK&oldid=1211891229 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Software development Software development is the process of designing and implementing
2166-605: The mid-1970s, the term would have been familiar to any office manager who consulted business periodicals. By the late 1960s, IBM had developed the IBM MT/ST (Magnetic Tape/Selectric Typewriter). It was a model of the IBM Selectric typewriter from earlier in 1961, but it came built into its own desk, integrated with magnetic tape recording and playback facilities along with controls and a bank of electrical relays. The MT/ST automated word wrap, but it had no screen. This device allowed
2223-879: The most popular systems of the 1970s and early 1980s. The Wang system displayed text on a CRT screen, and incorporated virtually every fundamental characteristic of word processors as they are known today. While early computerized word processor system were often expensive and hard to use (that is, like the computer mainframes of the 1960s), the Wang system was a true office machine, affordable to organizations such as medium-sized law firms, and easily mastered and operated by secretarial staff. The phrase "word processor" rapidly came to refer to CRT-based machines similar to Wang's. Numerous machines of this kind emerged, typically marketed by traditional office-equipment companies such as IBM, Lanier (AES Data machines - re-badged), CPT, and NBI. All were specialized, dedicated, proprietary systems, with prices in
2280-407: The number of bugs persisting after testing is complete. Once the code has been submitted, quality assurance —a separate department of non-programmers for most large companies—test the accuracy of the entire software product. Acceptance tests derived from the original software requirements are a popular tool for this. Quality testing also often includes stress and load checking (whether the software
2337-403: The performance of servers and other hardware. Designers often attempt to find patterns in the software's functionality to spin off distinct modules that can be reused with object-oriented programming . An example of this is the model–view–controller , an interface between a graphical user interface and the backend . The central feature of software development is creating and understanding
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2394-463: The process used for a development effort varies. The process may be confined to a formal, documented standard , or it can be customized and emergent for the development effort. The process may be sequential, in which each major phase (i.e. design, implement and test) is completed before the next begins, but an iterative approach – where small aspects are separately designed, implemented and tested – can reduce risk and cost and increase quality. Each of
2451-424: The product that developers can work from. Software analysts often decompose the project into smaller objects, components that can be reused for increased cost-effectiveness, efficiency, and reliability. Decomposing the project may enable a multi-threaded implementation that runs significantly faster on multiprocessor computers. During the analysis and design phases of software development, structured analysis
2508-466: The product, other internal software development staff, or a creative third party. Ideas for software products are usually first evaluated by marketing personnel for economic feasibility, fit with existing channels of distribution, possible effects on existing product lines, required features , and fit with the company's marketing objectives. In the marketing evaluation phase, the cost and time assumptions become evaluated. The feasibility analysis estimates
2565-503: The project's return on investment , its development cost and timeframe. Based on this analysis, the company can make a business decision to invest in further development. After deciding to develop the software, the company is focused on delivering the product at or below the estimated cost and time, and with a high standard of quality (i.e., lack of bugs) and the desired functionality. Nevertheless, most software projects run late and sometimes compromises are made in features or quality to meet
2622-412: The public. By the late 1970s, computerized word processors were still primarily used by employees composing documents for large and midsized businesses (e.g., law firms and newspapers). Within a few years, the falling prices of PCs made word processing available for the first time to all writers in the convenience of their homes. The first word processing program for personal computers ( microcomputers )
2679-422: The same license. As an alternative, developers may choose a proprietary alternative or write their own software module. Word processor Early word processors were stand-alone devices dedicated to the function, but current word processors are word processor programs running on general purpose computers. The functions of a word processor program fall somewhere between those of a simple text editor and
2736-491: The second half of the 1980s. The phrase "word processor" has been abbreviated as "Wa-pro" or "wapuro" in Japanese. The final step in word processing came with the advent of the personal computer in the late 1970s and 1980s and with the subsequent creation of word processing software. Word processing software that would create much more complex and capable output was developed and prices began to fall, making them more accessible to
2793-427: The software that implements the desired functionality. There are various strategies for writing the code. Cohesive software has various components that are independent from each other. Coupling is the interrelation of different software components, which is viewed as undesirable because it increases the difficulty of maintenance . Often, software programmers do not follow industry best practices, resulting in code that
2850-403: The software, but something else—such as services and modifications to open source software. Computer-aided software engineering (CASE) is tools for the partial automation of software development. CASE enables designers to sketch out the logic of a program, whether one to be written, or an already existing one to help integrate it with new code or reverse engineer it (for example, to change
2907-457: The time, (about $ 60,000 adjusted for inflation). The Redactron Corporation (organized by Evelyn Berezin in 1969) designed and manufactured editing systems, including correcting/editing typewriters, cassette and card units, and eventually a word processor called the Data Secretary. The Burroughs Corporation acquired Redactron in 1976. A CRT-based system by Wang Laboratories became one of
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#17330945229942964-520: The tools for estimating the amount of time and resources for software development were designed for conventional applications and are not applicable to web applications or mobile applications . An integrated development environment (IDE) supports software development with enhanced features compared to a simple text editor . IDEs often include automated compiling , syntax highlighting of errors, debugging assistance, integration with version control , and semi-automation of tests. Version control
3021-508: Was Electric Pencil , from Michael Shrayer Software , which went on sale in December 1976. In 1978, WordStar appeared and because of its many new features soon dominated the market. WordStar was written for the early CP/M (Control Program–Micro) operating system, ported to CP/M-86 , then to MS-DOS , and was the most popular word processing program until 1985 when WordPerfect sales first exceeded WordStar sales. Early word processing software
3078-445: Was founded in 1970 by James Lincoln and Robert Oleksiak. Linolex based its technology on microprocessors, floppy drives and software. It was a computer-based system for application in the word processing businesses and it sold systems through its own sales force. With a base of installed systems in over 500 sites, Linolex Systems sold 3 million units in 1975 — a year before the Apple computer
3135-588: Was not as intuitive as word processor devices. Most early word processing software required users to memorize semi-mnemonic key combinations rather than pressing keys such as "copy" or "bold". Moreover, CP/M lacked cursor keys; for example WordStar used the E-S-D-X-centered "diamond" for cursor navigation. A notable exception was the software Lexitype for MS-DOS that took inspiration from the Lexitron dedicated word processor's user interface and which mapped individual functions to particular keyboard function keys , and
3192-486: Was released. At that time, the Lexitron Corporation also produced a series of dedicated word-processing microcomputers. Lexitron was the first to use a full-sized video display screen (CRT) in its models by 1978. Lexitron also used 5 1 ⁄ 4 inch floppy diskettes, which became the standard in the personal computer field. The program disk was inserted in one drive, and the system booted up . The data diskette
3249-414: Was then put in the second drive. The operating system and the word processing program were combined in one file. Another of the early word processing adopters was Vydec, which created in 1973 the first modern text processor, the "Vydec Word Processing System". It had built-in multiple functions like the ability to share content by diskette and print it. The Vydec Word Processing System sold for $ 12,000 at
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