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  2. Telephone and Data Systems - Wikipedia

    en.wikipedia.org/wiki/Telephone_and_Data_Systems

    Telephone and Data Systems, Inc. is a Chicago -based telecommunications service company providing wireless products and services; cable and wireline broadband, TV and voice services; and hosted and managed services to approximately 6 million customers nationwide through its business units TDS Telecom and U.S. Cellular ( NYSE : USM) and OneNeck ...

  3. TDS Telecom - Wikipedia

    en.wikipedia.org/wiki/TDS_Telecom

    TDS Telecom is an American telecommunications company with headquarters in Madison, Wisconsin.It is a wholly owned subsidiary of Telephone and Data Systems Inc, and is the seventh-largest local exchange carrier in the U.S. TDS Telecom offers telephone, broadband Internet and television services to customers in 30 states and more than 900 rural and suburban communities, though it also serves ...

  4. United States Cellular Corporation - Wikipedia

    en.wikipedia.org/wiki/United_States_Cellular...

    US$133 million (2019) Number of employees. 4,800 (1Q 2023) Parent. Telephone and Data Systems (84%) Website. www .uscellular .com. United States Cellular Corporation ( doing business as UScellular and formerly known as U.S. Cellular) is an American mobile network operator. It is a subsidiary of Telephone and Data Systems Inc. (which owns an 84% ...

  5. Telephone switchboard - Wikipedia

    en.wikipedia.org/wiki/Telephone_switchboard

    Telephone switchboard. A telephone switchboard was a device used to connect circuits of telephones to establish telephone calls between users or other switchboards, throughout the 20th century. The switchboard was an essential component of a manual telephone exchange, and was operated by switchboard operators who used electrical cords or ...

  6. TRS-80 - Wikipedia

    en.wikipedia.org/wiki/TRS-80

    TRS-80 Model I. The TRS-80 Micro Computer System ( TRS-80, later renamed the Model I to distinguish it from successors) is a desktop microcomputer launched in 1977 and sold by Tandy Corporation through their Radio Shack stores. The name is an abbreviation of Tandy Radio Shack, Z80 [microprocessor]. [4] It is one of the earliest mass-produced ...

  7. Telecommunications device for the deaf - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_device...

    The specific GA and SK keys allow for speedier use of common . A telecommunications device for the deaf ( TDD) is a teleprinter, an electronic device for text communication over a telephone line, that is designed for use by persons with hearing or speech difficulties. Other names for the device include teletypewriter ( TTY ), textphone (common ...

  8. TDS Metrocom - Wikipedia

    en.wikipedia.org/wiki/TDS_Metrocom

    TDS Metrocom. TDS Metrocom is TDS Telecom 's local phone business, providing customers with phone, data, and Internet services in a five-state area in the midwestern United States. Its central office is located at 3416 University Ave in Madison, Wisconsin. Unlike Telecom, Metrocom used a deal brokered by Tommy Thompson to allow for local phone ...

  9. Model 500 telephone - Wikipedia

    en.wikipedia.org/wiki/Model_500_telephone

    The Western Electric 500-type telephone replaced the 300-type, which had been produced since 1936. The model 500 line was designed by the firm of industrial designer Henry Dreyfuss, the product of several years of research and testing in collaboration with Bell Laboratories and Western Electric. Development started in 1946 with early sketches ...

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