Misplaced Pages

#278721

84-460: Prior to 1973 Unix development at AT&T was a project of a small group of researchers in Department 1127 of Bell Labs . As the usefulness of Unix in other departments of Bell Labs was evident, the company decided to develop a version of Unix tailored to support programmers in production work, not just research. The Programmer's Workbench was started in 1973, by Evan Ivie and Rudd Canaday to support

168-487: A $ 39 billion stock and cash offer. The bid was withdrawn after the takeover company was faced with significant regulatory and legal hurdles, along with heavy resistance from the U.S. government. As per the original acquisition agreement, T-Mobile received $ 3 billion in cash as well as access to $ 1 billion worth of AT&T-held wireless spectrum. In September 2013, AT&T announced it would expand into Latin America through

252-589: A collaboration with América Móvil . In December 2013, AT&T announced plans to sell its Connecticut wireline operations to Stamford-based Frontier Communications . AT&T acquired BellSouth Corporation on December 29, 2006, following FCC approval. The transaction consolidated ownership and management of Cingular Wireless. AT&T rebranded its wireless retail stores from Cingular to AT&T in January 2007. In late 2014, AT&T purchased Mexican cellular carrier Iusacell , and two months later, it purchased

336-499: A computer center for a 1000-employee Bell Labs division, which would be the largest Unix site for several years. PWB/UNIX was to provide tools for teams of programmers to manage their source code and collaborate on projects with other team members. It also introduced several stability improvements beyond Research Unix, and broadened usage of the Research nroff and troff text formatters, via efforts with Bell Labs typing pools that led to

420-493: A lawsuit for the United States Department of Justice Antitrust Division to block the merger with Time Warner, saying it "will harm competition, result in higher bills for consumers and less innovation." On June 12, 2018, U.S. District Court Judge Richard J. Leon ruled that the merger could go forward. The merger closed two days afterwards, with Time Warner becoming a wholly owned subsidiary of AT&T. A day later,

504-594: A nearby property. In 1928, a 15-acre (6.1 ha) site in Chester Township, New Jersey , was leased for outdoor tests, though the facility became inadequate for such purposes. In 1930, the Chester location required the purchase of an additional 85 acres (34 ha) of land to be used for a new outdoor plant development laboratory. Prior to Chester being established, a test plot was installed in Limon, Colorado in 1929, similar to

588-567: A relatively distant role with the Bell System as a whole, but continued to pursue his own personal research interests. The Bell Patent Association was formed by Alexander Graham Bell , Thomas Sanders, and Gardiner Hubbard when filing the first patents for the telephone in 1876. Bell Telephone Company, the first telephone company, was formed a year later. It later became a part of the American Bell Telephone Company. In 1884,

672-472: A separate entity, selling a 30% stake to TPG Capital (owners of Astound Broadband cable), while retaining a 70% stake in the new standalone company. The deal was closed on August 2, 2021. On May 17, 2021, AT&T announced plans to relinquish its equity interest in WarnerMedia , and have it merge with Discovery, Inc. in a US$ 43 billion deal to establish a new media company. Electronic Arts , which

756-760: A shack in Montauk, Long Island . That same year, tests were performed on the first transoceanic radio telephone at a house in Arlington County, Virginia . A radio reception laboratory was established in 1919 in the Cliffwood section of Aberdeen Township, New Jersey . Additionally for 1919, a transmission studies site was established in Phoenixville, Pennsylvania that built, in 1929, the coaxial conductor line for first tests of long-distance transmission in various frequencies. On January 1, 1925, Bell Telephone Laboratories, Inc.

840-442: A specialty option. On April 24, 2020, AT&T announced that effective July 1, 2020, company COO John Stankey would replace Randall L. Stephenson as CEO of AT&T. It was also acknowledged that AT&T's acquisitions of DirecTV and Time Warner had by this point resulted in a massive debt burden of $ 200 billion for the company. As a result of planned cost cutting programs, the sale of Warner Bros. Interactive Entertainment

924-617: A wholly owned subsidiary of AT&T Inc. Cingular was then rebranded as AT&T Mobility . AT&T Inc. also acquired Time Warner in 2016, with the proposed merger confirmed on June 12, 2018 and the aim of making AT&T Inc. the largest and controlling shareholder of Time Warner, which it then rebranded as WarnerMedia in 2018. The company later withdrew its equity stake in WarnerMedia in 2022 and merged it with Discovery, Inc. to create Warner Bros. Discovery , divesting itself of its media arm. The current AT&T reconstitutes most of

SECTION 10

#1732851027279

1008-520: Is an American industrial research and development (R&D) company, currently operating as a subsidiary of Finnish technology company Nokia . With a long history, Bell Labs is credited with the development of radio astronomy , the transistor , the laser , the photovoltaic cell , the charge-coupled device (CCD), information theory , the Unix operating system, and the programming languages B , C , C++ , S , SNOBOL , AWK , AMPL , and others, throughout

1092-544: The Washington Post on May 10 confirmed the figure of 12 payments, which had begun three days after the President was sworn into office . AT&T confirmed the report the same day. The report from The Washington Post , as well as additional reporting from Bloomberg , revealed the payments had been made for Cohen to "provide guidance" relating to the attempted $ 85 billion merger with Time Warner , to gain information on

1176-665: The American Bell Telephone Company created the Mechanical Department from the Electrical and Patent Department formed a year earlier. American Telephone & Telegraph Company (AT&T) and its own subsidiary company took control of American Bell and the Bell System by 1889. American Bell held a controlling interest in Western Electric (which was the manufacturing arm of the business) whereas AT&T

1260-640: The American Telephone and Telegraph Company , is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas , Texas . It is the world's third largest telecommunications company by revenue and the third largest wireless carrier in the United States behind Verizon and T-Mobile . As of 2023, AT&T was ranked 13th on the Fortune 500 rankings of

1344-694: The Asia Pacific ; its regional headquarters is located in Hong Kong. The company is also active in Mexico, and on November 7, 2014, it was announced that Mexican carrier Iusacell would be acquired by AT&T. The acquisition was approved in January 2015. On April 30, 2015, AT&T acquired wireless operations Nextel Mexico from NII Holdings (now AT&T Mexico). AT&T's current board of directors as of March 2024: The current management as of March 2024 includes: According to OpenSecrets , AT&T

1428-525: The Baby Bells , Ameritech sold some of its Wisconsin landlines to CenturyTel , in 1998; BellSouth sold some of its lines to MebTel, during the 2000s; US West sold many historically Bell landlines to Lynch Communications and Pacific Telecom , in the 1990s; Verizon sold many of its New England lines to FairPoint in 2008, and its West Virginia operations to Frontier Communications in 2010. On October 25, 2014, Frontier Communications took over control of

1512-807: The Kingsbury Commitment , throughout most of the twentieth century. This monopoly was known as the Bell System , and during this period, AT&T was also known by the nickname Ma Bell . In 1982, U.S. regulators broke up the AT&;T monopoly , requiring AT&T to divest its local subsidiaries, which it did by grouping them into seven individual companies. These new companies were known as Regional Bell Operating Companies, or more informally, Baby Bells. AT&T continued to operate long-distance services but faced increasing competition from competitors such as MCI and Sprint . Southwestern Bell Corporation (SBC)

1596-551: The Number Five Crossbar Switching System . In 1952, William Gardner Pfann revealed the method of zone melting , which enabled semiconductor purification and level doping. In 1953, Maurice Karnaugh developed the Karnaugh map , used for managing of Boolean algebraic expressions. In January 1954, Bell Labs built one of the first completely transistorized computer machines, TRADIC or Flyable TRADIC, for

1680-573: The Summit, New Jersey , chemical laboratory was nearly 10 years established in a three-story building conducted experiments in corrosion, using various fungicides tests on cables, metallic components, or wood. For 1929, land was purchased in Holmdel Township, New Jersey , for a radio reception laboratory to replace the Cliffwood location that had been in operation since 1919. In 1930, the Cliffwood location

1764-400: The U.S. Federal Communications Commission (FCC) follows in its rulemaking processes. The FCC would have to act in a more transparent way as a result of this bill, forced to accept public input about regulations. AT&T's Executive Vice President of Federal Relations, Tim McKone, said that the bill's "much needed institutional reforms will help arm the agency with the tools to keep pace with

SECTION 20

#1732851027279

1848-444: The charge-coupled device (CCD), and many other optical, wireless, and wired communications technologies and systems. In 1924, Bell Labs physicist Walter A. Shewhart proposed the control chart as a method to determine when a process was in a state of statistical control. Shewhart's methods were the basis for statistical process control (SPC): the use of statistically based tools and techniques to manage and improve processes. This

1932-402: The thermal noise in a resistor was first measured by John B. Johnson , for which Harry Nyquist provided the theoretical analysis; this is now termed Johnson-Nyquist noise . During the 1920s, the one-time pad cipher was invented by Gilbert Vernam and Joseph Mauborgne at the laboratories. Bell Labs' Claude Shannon later proved that it is unbreakable. In 1928, Harold Black invented

2016-592: The -mm macros. While PWB users managed their source code on PDP-11 Unix systems, programs were often written to run on other operating systems. For this reason, PWB included software for submitting jobs to IBM System/370 , UNIVAC 1100 series , and SDS Sigma 5 computers. In 1977 PWB supported a user community of about 1100 users in the Business Information Systems Programs (BISP) group of Bell Labs. Two major releases of Programmer's Workbench were produced. PWB/UNIX 1.0, released July 1, 1977

2100-640: The 20th century, AT&T had a monopoly on phone service in the United States. The company was formally rebranded as AT&T Corporation in 1994. The 1982 United States v. AT&T antitrust lawsuit resulted in the divestiture of AT&T's ("Ma Bell") local operating subsidiaries which were grouped into seven Regional Bell Operating Companies (RBOCs), commonly referred to as "Baby Bells", resulting in seven independent companies, including Southwestern Bell Corporation (SBC). The latter changed its name to SBC Communications Inc. in 1995. In 2005, SBC purchased its former parent AT&T Corp. and took on

2184-662: The 20th century. Ten Nobel Prizes and five Turing Awards have been awarded for work completed at Bell Laboratories. The laboratory began in the late 19th century as the Western Electric Engineering Department, located at 463 West Street in New York City. After years of conducting research and development under Western Electric , a Bell subsidiary, the Engineering Department was reformed into Bell Telephone Laboratories in 1925 and placed under

2268-619: The AT&T landline network in Connecticut after being approved by state utility regulators. The deal was worth about $ 2 billion, and included Frontier inheriting about 2,500 of AT&T's employees and many of AT&T's buildings. The company is headquartered at Whitacre Tower in downtown Dallas, Texas. On June 27, 2008, AT&T announced that it would move its corporate headquarters from downtown San Antonio to One AT&T Plaza in downtown Dallas. The company said that it moved to gain better access to its customers and operations throughout

2352-646: The Allies in World War II . The British wartime codebreaker Alan Turing visited the labs at this time, working on speech encryption and meeting Claude Shannon . Bell Labs Quality Assurance Department gave the world and the United States such statisticians as Walter A. Shewhart , W. Edwards Deming , Harold F. Dodge , George D. Edwards , Harry Romig, R. L. Jones, Paul Olmstead, E.G.D. Paterson, and Mary N. Torrey . During World War II, Emergency Technical Committee – Quality Control, drawn mainly from Bell Labs' statisticians,

2436-568: The Caribbean under the Vrio brand; and Advertising and Analytics, since renamed Xandr . On July 13, 2017, it was reported that AT&T would introduce a cloud-based DVR streaming service. It hoped to create a unified platform across DirecTV and its DirecTV Now streaming service, with U-verse to be added shortly afterward. The service, named HBO Max , launched in May 2020. On September 12, 2017, it

2520-484: The IPO due to market conditions. As of 2019, AT&T is the world's largest telecommunications company. AT&T is also the largest provider of mobile telephone services and the largest provider of fixed telephone (landline) services in the United States. In September 2019, activist investor Elliott Management revealed that it had purchased $ 3.2 billion of AT&T stock (a 1.2% equity interest), and had pushed for

2604-567: The Internet speed of today's marketplace. It will also ensure that outmoded regulatory practices for today's competitive marketplace are properly placed in the dustbin of history." In May 2018, reports emerged that AT&T made 12 monthly payments between January and December 2017 to Essential Consultants, a company set up by President Donald Trump 's lawyer Michael Cohen , totaling $ 600,000. Although initial reports on May 8 mentioned only four monthly payments totaling $ 200,000, documents obtained by

PWB/UNIX - Misplaced Pages Continue

2688-590: The Mexican wireless business of NII Holdings . AT&T merged the two companies to create AT&T Mexico . In July 2015, AT&T purchased DirecTV for $ 48.5 billion. AT&T then announced plans to converge its existing U-verse home internet and IPTV brands with DirecTV , to create AT&T Entertainment . On October 22, 2016, AT&T announced a deal to buy Time Warner for $ 108.7 billion in an effort to increase its media holdings. On November 20, 2017, Assistant Attorney General Makan Delrahim filed

2772-553: The Private Enterprise Board of the American Legislative Exchange Council (ALEC). ALEC is a nonprofit organization of conservative state legislators and private sector representatives that drafts and shares model state-level legislation for distribution among state governments in the United States. During the period of 1998 to 2019, the company expended US$ 380.1 million on lobbying in

2856-570: The Trump administration's planned tax reforms, as well as about potential changes to net neutrality policies under the new FCC. Chairman of the FCC Ajit Pai denied Cohen ever inquired about net neutrality on AT&T's behalf. A spokesperson for AT&T said that the company had been contacted by the Special Counsel investigation led by Robert Mueller regarding the payments, and had provided all

2940-497: The United States Air Force with 10,358 germanium point-contact diodes and 684 Bell Labs Type 1734 Type A cartridge transistors. The design team was led by electrical engineer Jean Howard Felker with James R. Harris and Louis C. Brown ("Charlie Brown") as the lead engineers on the project, which started in 1951. The device took only 3 cubic-feet and consumed 100 watt power for its small and low powered design in comparison to

3024-519: The United States. A key political issue for AT&T has been the question of which businesses win the right to profit by providing broadband internet access in the United States. The company has also lobbied in support of several federal bills. AT&T supported the Federal Communications Commission Process Reform Act of 2013 (H.R. 3675; 113th Congress) , a bill that would make a number of changes to procedures that

3108-597: The Voder being demonstrated at the 1939 New York World's Fair. Bell researcher Clinton Davisson shared the Nobel Prize in Physics with George Paget Thomson for the discovery of electron diffraction , which helped lay the foundation for solid-state electronics . In the early 1940s, the photovoltaic cell was developed by Russell Ohl . In 1943, Bell developed SIGSALY , the first digital scrambled speech transmission system, used by

3192-453: The Washington, D.C. home of his father, linguist Alexander Melville Bell . The carriage house there, at 1527 35th Street N.W., became their headquarters in 1889. In 1893, Bell constructed a new building close by at 1537 35th Street N.W., specifically to house the lab. This building was declared a National Historic Landmark in 1972. After the invention of the telephone, Bell maintained

3276-760: The Whippany site was purchased by Bayer ). The largest grouping of people in the company was in Illinois , at Naperville - Lisle , in the Chicago area, which had the largest concentration of employees (about 11,000) prior to 2001. There also were groups of employees in Indianapolis , Indiana; Columbus, Ohio ; North Andover, Massachusetts ; Allentown, Pennsylvania ; Reading, Pennsylvania ; and Breinigsville, Pennsylvania ; Burlington, North Carolina (1950s–1970s, moved to Greensboro 1980s) and Westminster, Colorado . Since 2001, many of

3360-469: The better-known AT&T name and brand, with the original AT&T Corporation still existing as the long-distance landline subsidiary of the merged company. The current AT&T Inc. claims the original AT&T Corporation's history (dating to 1877) as its own, but retains SBC's pre-2005 corporate structure and stock price history. As well, all SEC filings before 2005 are under SBC, not AT&T. AT&T made an attempt in 2011 to purchase T-Mobile for

3444-411: The board of directors was John J. Carty , AT&T's vice president, and the first president was Frank B. Jewett , also a board member, who stayed there until 1940. The operations were directed by E. B. Craft, executive vice-president, and formerly chief engineer at Western Electric. In the early 1920s, a few outdoor facilities and radio communications development facilities were developed. In 1925,

PWB/UNIX - Misplaced Pages Continue

3528-604: The breach. AT&T was also reported to have been affected by a 2024 attack from the Salt Typhoon advanced persistent threat linked to the Chinese government . Of the eight companies that were part of the Breakup of the Bell System, these five are a part of the current AT&T: AT&T's wireline business provides services in 22 states. The following companies have become defunct or were sold under SBC/AT&T ownership: Of

3612-593: The center of the galaxy . In 1931 and 1932, the labs made experimental high fidelity, long playing, and even stereophonic recordings of the Philadelphia Orchestra , conducted by Leopold Stokowski . In 1933, stereo signals were transmitted live from Philadelphia to Washington, D.C. In 1937, the vocoder , an electronic speech compression device, or codec, and the Voder , the first electronic speech synthesizer , were developed and demonstrated by Homer Dudley ,

3696-800: The company changed its name to SBC Communications Inc. In early 1997 C. Michael Armstrong was named CEO, and Armstrong appointed John Zeglis as president later in that same year. By 1998, the company was in the top 15 of the Fortune 500, and by 1999, when Zeglis assumed the positions of chairman and CEO of AT&T Wireless , AT&T was part of the Dow Jones Industrial Average (lasting through 2015). Zeglis ended his service as president of AT&T in 2001 and resigned from his positions in AT&T Wireless in 2004. On November 18, 2005, SBC Communications purchased its former parent, AT&T Corporation for $ 16 billion. After this purchase, SBC adopted

3780-402: The company is reported to shareholders on an annual basis and a matter of public record. Where performance has been restated, the most recent statement of performance from an annual report is used. AT&T reported Total CO2e emissions (Direct + Indirect) for the twelve months ending 31 December 2020 at 5,788 Kt (-737 /-11.3% y-o-y) and plans to reduce emissions by 63% by 2030 from

3864-421: The company to divest assets to improve its share value. On March 4, 2020, AT&T announced its intent to perform major cost-cutting moves, including cuts to capital investment, and plans to promote AT&T TV (which officially launched nationally on March 2) as its primary pay television service offering. AT&T stated it would still primarily promote DirecTV "where cable broadband is not prevalent", and as

3948-527: The company was renamed WarnerMedia. Three months after completing the acquisition, AT&T reorganized into four main units: Communications, including consumer and business wireline telephony, AT&T Mobility, and consumer entertainment video services; WarnerMedia, including Turner cable television networks, Warner Bros. film and television production, and HBO ; AT&T Latin America, consisting of wireless service in Mexico and video in Latin America and

4032-530: The decade. Shannon was also the founder of modern cryptography with his 1949 paper Communication Theory of Secrecy Systems . The 1950s also saw developments based upon information theory . The central development was binary code systems. Efforts concentrated on the prime mission of supporting the Bell System with engineering advances, including the N-carrier system, TD microwave radio relay , direct distance dialing , E- repeater , wire spring relay , and

4116-572: The first transatlantic communications cable to carry telephone conversations, was laid between Scotland and Newfoundland in a joint effort by AT&T, Bell Laboratories, and British and Canadian telephone companies. In 1957, Max Mathews created MUSIC , one of the first computer programs to play electronic music . Robert C. Prim and Joseph Kruskal developed new greedy algorithms that revolutionized computer network design . In 1957 Frosch and Derick, using masking and predeposition, were able to manufacture silicon dioxide field effect transistors;

4200-408: The first planar transistors, in which drain and source were adjacent at the same surface. They showed that silicon dioxide insulated, protected silicon wafers and prevented dopants from diffusing into the wafer. In 1958, a technical paper by Arthur Schawlow and Charles Hard Townes first described the laser . AT%26T AT&T Inc. , an abbreviation for its predecessor's former name,

4284-427: The former Bell System , and includes four of the seven "Baby Bells" along with the original AT&T Corp., including the long-distance division . AT&T was founded as Bell Telephone Company by Alexander Graham Bell , Thomas Watson and Gardiner Greene Hubbard after Bell's patenting of the telephone in 1875. By 1881, Bell Telephone Company had become the American Bell Telephone Company. One of its subsidiaries

SECTION 50

#1732851027279

4368-434: The former locations have been scaled down or closed. Bell's Holmdel research and development lab , a 1,900,000-square-foot (180,000 m ) structure set on 473 acres (191 ha), was closed in 2007. The mirrored-glass building was designed by Eero Saarinen . In August 2013, Somerset Development bought the building, intending to redevelop it into a mixed commercial and residential project. A 2012 article expressed doubt on

4452-510: The headquarters for AT&T Mobility, with significant offices in Redmond, Washington, the former home of AT&T Wireless . Bedminster, New Jersey, is the headquarters for the company's Global Business Services group and AT&T Labs and is where the original AT&T Corp. remains located. St. Louis continues as home to the company's Directory operations, AT&T Advertising Solutions . AT&T also offers services in many locations throughout

4536-666: The information requested in November and December 2017. In early 2019, the Democratic House Judiciary requested records related to the AT&T-Time Warner merger from the White House . While it has expressed support for LGBTQ causes, AT&T has also donated to sponsors of anti-transgender legislation in several US states, especially those predominantly Republican -governed, including Arkansas, Tennessee, North Carolina, Texas and Florida. The financial performance of

4620-524: The largest United States corporations, with revenues of $ 122.4 billion. The modern company to bear the AT&T name began its history as the American District Telegraph Company, formed in St. Louis in 1878. After expanding services to Arkansas , Kansas , Oklahoma and Texas through a series of mergers, it became Southwestern Bell Telephone Company in 1920, which was then a subsidiary of

4704-597: The later Bell Laboratories locations in New Jersey were Holmdel Township , Crawford Hill , the Deal Test Site , Freehold , Lincroft , Long Branch , Middletown , Neptune Township , Princeton , Piscataway , Red Bank , Chester Township , and Whippany . Of these, Murray Hill and Crawford Hill remain in existence (the Piscataway and Red Bank locations were transferred to and are now operated by Telcordia Technologies and

4788-411: The latter's branding, history, and stock trading symbol, as well as a version of its iconic logo. The merged entity, naming itself AT&T Inc., launched on December 30, 2005. The newly merged and renamed AT&T Inc. acquired BellSouth Corporation in 2006, the last independent Baby Bell, making the two companies' joint venture Cingular Wireless (which had itself acquired AT&T Wireless in 2004)

4872-401: The location performed precision frequency-measuring apparatus, field strength measurements, and conducted radio interference. By the early 1940s, Bell Labs engineers and scientists had begun to move to other locations away from the congestion and environmental distractions of New York City, and in 1967 Bell Laboratories headquarters was officially relocated to Murray Hill, New Jersey . Among

4956-482: The negative feedback system commonly used in amplifiers. Later, Harry Nyquist analyzed Black's design rule for negative feedback. This work was published in 1932 and became known as the Nyquist criterion . In 1931, a foundation for radio astronomy was laid by Karl Jansky during his work investigating the origins of static on long-distance shortwave communications . He discovered that radio waves were being emitted from

5040-558: The one in Gulfport. The three test plots at Gulfport, Limon, and Chester were outdoor facilities for preservatives and prolonging the use of telephone poles. Additionally, in 1929, a land expansion was done at the Deal Labs to 208 acres (84 ha). This added land increased the facility for radio transmission studies. The beginning of 1930s, established three facilities with radio communications experiments and chemical aspects testing. By 1939,

5124-490: The original American Telephone & Telegraph Company . The latter was a successor of the original Bell Telephone Company founded by Alexander Graham Bell in 1877. The American Bell Telephone Company formed the American Telephone and Telegraph Company (AT&T) subsidiary in 1885. In 1899, AT&T became the parent company after the American Bell Telephone Company sold its assets to its subsidiary. During most of

SECTION 60

#1732851027279

5208-497: The result was not published until 1950. In 1948, " A Mathematical Theory of Communication ", one of the founding works in information theory , was published by Claude Shannon in the Bell System Technical Journal . It built in part on earlier work in the field by Bell researchers Harry Nyquist and Ralph Hartley , but went much further. Bell Labs also introduced a series of increasingly complex calculators through

5292-410: The shared ownership of Western Electric and the American Telephone and Telegraph Company (AT&T). In the 1960s, laboratory and company headquarters were moved to Murray Hill, New Jersey . Its alumni during this time include people like William Shockley , Dennis Ritchie , Claude Shannon and Willard Boyle . Bell Labs became a subsidiary of AT&T Technologies in 1984 after the Bell System

5376-464: The success of the newly named Bell Works site, but several large tenants had announced plans to move in through 2016 and 2017. Bell Lab's 1974 corporate directory listed 22 labs in the United States, located in: Nokia Bell Lab's 2024 website pictured 10 labs, located in: Also listed as research locations without additional information was Sunnyvale, California , US and Tampere, Finland . The Naperville, Illinois Bell Labs location near Chicago

5460-560: The test plot studies were established at Gulfport, Mississippi , where there were numerous telephone pole samples established for wood preservation. At the Deal, New Jersey location, work was done on ship-to-shore radio telephony. In 1926, in the Whippany section of Hanover Township, New Jersey , land was acquired and established for the development of a 50-kilowatt broadcast transmitter. In 1931, Whippany increased with 75 acres (30 ha) added from

5544-470: The vacuum tube designs of the times. The device could be installed in a B-52 Stratofortress Bomber and had a performance up to one million logical operations a second. The flyable program used a Mylar sheet with punched holes, instead of the removable plugboard. In 1954, the first modern solar cell was invented at Bell Laboratories. In 1955, Carl Frosch and Lincoln Derick discovered semiconductor surface passivation by silicon dioxide. In 1956 TAT-1 ,

5628-551: The world, and to the key technology partners, suppliers, innovation and human resources needed as it continues to grow, domestically and internationally. AT&T Inc. previously relocated its corporate headquarters to San Antonio from St. Louis, Missouri, in 1992, when it was then named Southwestern Bell Corporation. The company's Telecom Operations group, which serves residential and regional business customers in 22 U.S. states, remains in San Antonio. Atlanta, Georgia, continues to be

5712-588: Was a bidder in the proposed sale of Warner Bros Interactive Entertainment, purchased the mobile gaming studio Playdemic from WBIE for US$ 1.4 billion in June 2021. In September 2021, Fox Corporation acquired TMZ from WarnerMedia in a deal worth about $ 50 million with TMZ being operated under the Fox Entertainment division. On December 21, 2021, AT&T announced that they had agreed to sell Xandr (and AppNexus ) to Microsoft for an undisclosed price. The deal

5796-453: Was based on Version 6 Unix ; PWB 2.0 was based on Version 7 Unix . The operating system was advertised by Bell System Software as late as 1981 and edition 1.0 was still on an AT&T price list for educational institutions in 1984. Most of PWB/UNIX was later incorporated in the commercial UNIX System III and UNIX System V releases. Notable firsts in PWB include: Bell Labs Bell Labs

5880-458: Was broken up . After the breakup, its funding greatly declined. In 1996, AT&T Technologies was spun off and renamed to Lucent Technologies, who used the Murray Hill site as their headquarters. Bell Laboratories was split as well, with part of it going to AT&T as AT&T Laboratories . In 2006, Lucent merged with French telecommunications company Alcatel to form Alcatel-Lucent , which

5964-501: Was completed in June 2022. On April 8, 2022, the spinoff of WarnerMedia and its subsequent merger with Discovery, Inc. to form Warner Bros. Discovery was completed. As a result of this merger, HBO Max and other video services were dropped from AT&T's unlimited plan offering. AT&T was one of several clients of Snowflake Inc. that had data stolen in a 2024 breach. Phone and text logs from May 1, 2022 to October 31, 2022 of "nearly all" AT&T customers were exposed as part of

6048-495: Was considered the Chicago Innovation Center and hosted Nokia's second annual Algorithm World event in 2022. Bell Laboratories was, and is, regarded by many as the premier research facility of its type, developing a wide range of revolutionary technologies, including radio astronomy , the transistor , the laser , information theory , the operating system Unix , the programming languages C and C++ , solar cells ,

6132-438: Was doing research into the service providers. In 1896, Western Electric bought property at 463 West Street to centralize the manufacturers and engineers which had been supplying AT&T with such technology as telephones, telephone exchange switches and transmission equipment. During the early 20th century, several historically significant laboratories were established. In 1915, the first radio transmissions were made from

6216-498: Was ending its operations as Holmdel was established. Whereas, in 1930, a location in Mendham Township, New Jersey , was established to continue radio receiver developments farther from the Whippany location and eliminate transmitter interference at that facility with developments. The Mendham location worked on communication equipment and broadcast receivers. These devices were used for marine, aircraft, and police services as well as

6300-748: Was in turn acquired by Nokia in 2016. In 1880, when the French government awarded Alexander Graham Bell the Volta Prize of 50,000   francs for the invention of the telephone (equivalent to about US$ 10,000 at the time, or about $ 330,000 now), he used the award to fund the Volta Laboratory (also known as the "Alexander Graham Bell Laboratory") in Washington, D.C. in collaboration with Sumner Tainter and Bell's cousin Chichester Bell . The laboratory

6384-460: Was instrumental in advancing Army and Navy ammunition acceptance and material sampling procedures. In 1947, the transistor , arguably the most important invention developed by Bell Laboratories, was invented by John Bardeen , Walter Houser Brattain , and William Bradford Shockley (who subsequently shared the Nobel Prize in Physics in 1956). In 1947, Richard Hamming invented Hamming codes for error detection and correction . For patent reasons,

6468-479: Was one of the companies created by the breakup of AT&T Corp. The company soon started a series of acquisitions, including the 1987 acquisition of Metromedia mobile business and the acquisition of several cable companies in the early 1990s. In the latter half of the 1990s, the company acquired several other telecommunications companies, including two Baby Bells ( Pacific Telesis Group and Ameritech Corporation ), while selling its cable business. During this time,

6552-420: Was organized to consolidate the development and research activities in the communication field and allied sciences for the Bell System. Ownership was evenly shared between Western Electric and AT&T. The new company had 3600 engineers, scientists, and support staff. Its 400,000-square-foot (37,000 m ) space was expanded with a new building occupying about one quarter of a city block. The first chairman of

6636-590: Was proposed, but ultimately abandoned due to COVID-19 pandemic -related growth in the video gaming industry, as well as a positive reception to upcoming DC Comics , Lego Star Wars , and Harry Potter titles from fans and critics. Crunchyroll was sold to Sony 's Funimation for US$ 1.175 billion in December 2020, with the acquisition closing in August 2021. On February 25, 2021, AT&T announced that it would spin-off DirecTV, U-Verse TV, and DirecTV Stream into

6720-428: Was reported that AT&T planned to launch a new cable TV-like service for delivery over-the-top over its own or a competitor's broadband network sometime the following year. On March 7, 2018, the company prepared to sell a minority stake of DirecTV Latin America through an IPO , creating a new holding company for those assets named Vrio Corp. On April 18, just a day before the public debut of Vrio, AT&T canceled

6804-406: Was the American Telephone and Telegraph Company (AT&T), established in 1885. On December 30, 1899, AT&T acquired the assets of its parent American Bell Telephone, becoming the new parent company. AT&T established a network of local telephone subsidiaries in the United States. AT&T and its subsidiaries held a phone service monopoly , authorized in 1913 by government authorities with

6888-418: Was the fourteenth-largest donor to United States federal political campaigns and committees from 1989 to 2019, having contributed more than US$ 84.1 million , 42% of which went to Republicans and 58% of which went to Democrats . In 2005, AT&T was among 53 entities that contributed the maximum of $ 250,000 to the second inauguration of President George W. Bush . Bill Leahy, representing AT&T, sits on

6972-427: Was the origin of the modern quality control movement, including Six Sigma . In 1926, the laboratories invented an early synchronous-sound motion picture system, in competition with Fox Movietone and DeForest Phonofilm . In 1927, a Bell team headed by Herbert E. Ives successfully transmitted long-distance 128-line television images of Secretary of Commerce Herbert Hoover from Washington to New York. In 1928

7056-639: Was variously known as the Volta Bureau , the Bell Carriage House , the Bell Laboratory and the Volta Laboratory . It focused on the analysis, recording, and transmission of sound. Bell used his considerable profits from the laboratory for further research and education advancing the diffusion of knowledge relating to the deaf. This resulted in the founding of the Volta Bureau ( c.  1887 ) at

#278721