Statements (108)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:telecommunications_company
|
| gptkbp:antitrustCase |
gptkb:United_States_v._AT&T
|
| gptkbp:antitrustSettlement |
gptkb:Modified_Final_Judgment_(1982)
|
| gptkbp:dissolved |
gptkb:Breakup_of_the_Bell_System
1984 |
| gptkbp:founded |
1885
|
| gptkbp:founder |
gptkb:Alexander_Graham_Bell
|
| gptkbp:fullName |
gptkb:American_Telephone_and_Telegraph_Company
|
| gptkbp:governmentRegulation |
Regulated by FCC
|
| gptkbp:headquartersLocation |
gptkb:New_York_City
|
| https://www.w3.org/2000/01/rdf-schema#label |
AT&T (before 1996)
|
| gptkbp:industry |
Telecommunications
Telegraphy Telephony |
| gptkbp:logo |
Bell logo
|
| gptkbp:nickname |
gptkb:Ma_Bell
|
| gptkbp:notableAchievement |
Development of C programming language
Development of UNIX Invention of the transistor |
| gptkbp:notableEmployee |
gptkb:Claude_Shannon
gptkb:John_Bardeen gptkb:Walter_Brattain gptkb:William_Shockley |
| gptkbp:notableEvent |
gptkb:Development_of_911_emergency_number
gptkb:Development_of_ATM_(Asynchronous_Transfer_Mode) gptkb:Development_of_North_American_Numbering_Plan_(NANP) gptkb:Development_of_Picturephone gptkb:Development_of_SONET gptkb:Development_of_Telstar_satellite gptkb:Development_of_UNIX_operating_system gptkb:Development_of_digital_subscriber_line_(DSL) Breakup into Baby Bells Development of C programming language Development of ISDN Development of T-carrier system Development of T1 line Development of T3 line Development of area codes Development of automatic call distributor (ACD) Development of call forwarding Development of call waiting Development of caller ID Development of cellular telephone technology Development of coaxial cable transmission Development of data communications Development of data transmission protocols Development of digital signal processing Development of digital switching Development of digital transmission Development of electronic directory assistance Development of electronic switching system (ESS) Development of facsimile transmission Development of fiber optic communications Development of frame relay Development of information theory Development of information theory (Claude Shannon) Development of international direct dialing Development of international telephone standards Development of laser Development of microwave relay networks Development of mobile telephone service Development of modem technology Development of network management systems Development of network reliability standards Development of operator services Development of packet switching Development of payphone technology Development of private branch exchange (PBX) Development of public telephone networks Development of satellite communications Development of solar cell Development of speech recognition Development of speech synthesis Development of telecommunications patents Development of telecommunications research Development of telephone answering machines Development of telephone billing systems Development of telephone education programs Development of telephone museums Development of telephone numbering plan Development of telephone switching centers Development of three-way calling Development of time-division multiplexing (TDM) Development of toll-free 800 service Development of touch-tone dialing Development of video conferencing Development of DTMF (Dual-tone multi-frequency signaling) Invention of the transistor (1947) Development of TAT-1 (first transatlantic telephone cable) Development of frequency-division multiplexing (FDM) |
| gptkbp:notableProduct |
gptkb:Transcontinental_telephone_line
Bell Labs inventions Telephone service |
| gptkbp:numberOfEmployees |
over 1 million (at peak)
|
| gptkbp:parentCompany |
gptkb:Bell_System
|
| gptkbp:servesArea |
gptkb:Canada
gptkb:Caribbean gptkb:United_States |
| gptkbp:status |
Legal monopoly (until 1984)
|
| gptkbp:stockSymbol |
T
|
| gptkbp:subsidiary |
gptkb:Bell_Labs
gptkb:Western_Electric gptkb:Long_Lines |
| gptkbp:successor |
gptkb:AT&T_Inc.
gptkb:Regional_Bell_Operating_Companies |
| gptkbp:tradedOn |
gptkb:New_York_Stock_Exchange
|
| gptkbp:bfsParent |
gptkb:Lucent_Technologies
|
| gptkbp:bfsLayer |
5
|