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  2. 3B series computers - Wikipedia

    en.wikipedia.org/wiki/3B_series_computers

    The 3B series computers [1] [2] are a line of minicomputers [3] made between the late 1970s and 1993 by AT&T Computer Systems' Western Electric subsidiary, for use with the company's UNIX operating system. The line primarily consists of the models 3B20, 3B5, 3B15, 3B2, and 3B4000.

  3. Larsen & Toubro - Wikipedia

    en.wikipedia.org/wiki/Larsen_&_Toubro

    As of 31 March 2022, L&T has 93 subsidiaries, 5 associate companies, 27 joint ventures and 35 joint operations. [18]L&T – Construction Equipment Limited: having its registered office at Mumbai, India and focusing on construction equipment and mining equipment, L&T-Komatsu Limited [19] was a joint-venture of Larsen and Toubro, and Komatsu Asia Pacific Pte Limited, Singapore, a wholly owned ...

  4. L-carrier - Wikipedia

    en.wikipedia.org/wiki/L-carrier

    L-carrier also carried the first television network connections, though the later microwave radio relay system soon became more important for this purpose. Type L-3 was used for a short time for coast-to-coast network television feeds, but the advent of NTSC color was the cause for the move to Type TD microwave radio.

  5. T-carrier - Wikipedia

    en.wikipedia.org/wiki/T-carrier

    The T-carrier is a hardware specification for carrying multiple time-division multiplexed (TDM) telecommunications channels over a single four-wire transmission circuit. It was developed by AT&T at Bell Laboratories ca. 1957 and first employed by 1962 for long-haul pulse-code modulation (PCM) digital voice transmission with the D1 channel bank.

  6. Earthing system - Wikipedia

    en.wikipedia.org/wiki/Earthing_system

    An earthing system (UK and IEC) or grounding system (US) connects specific parts of an electric power system with the ground, typically the equipment's conductive surface, for safety and functional purposes. [1] The choice of earthing system can affect the safety and electromagnetic compatibility of the installation.

  7. History of AT&T - Wikipedia

    en.wikipedia.org/wiki/History_of_AT&T

    A Bell System logo (called the Blue Bell) used from 1889 to 1900 [citation needed] AT&T's lines and metallic circuit connections. March 1, 1891. The formation of the Bell Telephone Company superseded an agreement between Alexander Graham Bell and his financiers, principal among them Gardiner Greene Hubbard and Thomas Sanders.

  8. Breakup of the Bell System - Wikipedia

    en.wikipedia.org/wiki/Breakup_of_the_Bell_System

    The breakup of the Bell System resulted in the creation of seven independent companies that were formed from the original twenty-two AT&T-controlled members of the System. [5] On January 1, 1984, these companies and the local operating companies placed under them were: Ameritech. Illinois Bell; Indiana Bell; Michigan Bell; Ohio Bell; Wisconsin Bell

  9. Jon Gruden - Wikipedia

    en.wikipedia.org/wiki/Jon_Gruden

    Jon David Gruden (born August 17, 1963) is an American professional football coach who is an advisor for the Milano Seamen of the European League of Football.He held his first head coaching position with the Raiders franchise during their Oakland tenure from 1998 to 2001, where he won two consecutive division titles and made an AFC Championship Game appearance.