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創于1877年，世界500強，曾長期壟斷美國長途和本地電話市場，2018年完成收購時代華納，旗下擁有HBO、Turner廣播、CNN、華納兄弟影視公司等多個全球知名媒體品牌

AT&T公(gong)司(si)（英(ying)語(yu)：AT&T Inc.，原為American Telephone & Telegraph的縮寫(xie)，也(ye)是(shi)中文(wen)譯名美(mei)國(guo)(guo)電(dian)話(hua)電(dian)報公(gong)司(si)由來(lai)，但(dan)近年來(lai)已不(bu)用(yong)全(quan)名），是(shi)一家美(mei)國(guo)(guo)電(dian)信(xin)公(gong)司(si)，創建于1877年。 AT&T在近120年中，曾經過(guo)多次分(fen)拆(chai)和重組。 AT&T也(ye)是(shi)是(shi)美(mei)國(guo)(guo)NBA聯盟圣(sheng)安東尼奧(ao)馬刺的球館英(ying)語(yu)名AT&T Center。

美國(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)話(hua)(hua)電(dian)(dian)(dian)(dian)(dian)(dian)報公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)有(you)(you)8個(ge)(ge)主(zhu)要(yao)部門 ：貝(bei)爾實驗室(shi)、商業市場集(ji)團(tuan)(tuan)(tuan)、數據系統公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si) 、通(tong)用市場集(ji)團(tuan)(tuan)(tuan) 、網絡運營集(ji)團(tuan)(tuan)(tuan)、網絡系統集(ji)團(tuan)(tuan)(tuan)、技術系統集(ji)團(tuan)(tuan)(tuan)、公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)國(guo)(guo)(guo)際集(ji)團(tuan)(tuan)(tuan)。主(zhu)要(yao)業務(wu)是：為(wei)(wei)國(guo)(guo)(guo)內國(guo)(guo)(guo)際提供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)話(hua)(hua)服(fu)務(wu)。利用海(hai)底(di)電(dian)(dian)(dian)(dian)(dian)(dian)纜、海(hai)底(di)光纜、通(tong)信(xin)衛星(xing)，可聯系250個(ge)(ge)國(guo)(guo)(guo)家和地(di)區(qu)，147個(ge)(ge)國(guo)(guo)(guo)家和地(di)區(qu)可直接撥號。提供(gong)商業機(ji)器、數據類(lei)產(chan)品和消(xiao)費類(lei)產(chan)品。提供(gong)電(dian)(dian)(dian)(dian)(dian)(dian)信(xin)網絡系統。各種(zhong)服(fu)務(wu)及租賃業務(wu)。它還為(wei)(wei)政(zheng)府(fu)提供(gong)產(chan)品和服(fu)務(wu)。該公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)非常重(zhong)視科研(yan)和開發新(xin)產(chan)品。美國(guo)(guo)(guo)電(dian)(dian)(dian)(dian)(dian)(dian)話(hua)(hua)電(dian)(dian)(dian)(dian)(dian)(dian)報公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)在泰國(guo)(guo)(guo)、德國(guo)(guo)(guo)、新(xin)加坡等地(di)設(she)有(you)(you)工廠。在意大利、韓國(guo)(guo)(guo)、日本(ben)等國(guo)(guo)(guo)設(she)有(you)(you)子公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)或者(zhe)合(he)資(zi)公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)。1995年(nian)9月，該公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)解體為(wei)(wei)三(san)個(ge)(ge)獨立的(de)(de)公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)：通(tong)訊服(fu)務(wu)公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)、通(tong)訊設(she)備公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)、電(dian)(dian)(dian)(dian)(dian)(dian)腦信(xin)息服(fu)務(wu)公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)，并且退(tui)出(chu)個(ge)(ge)人電(dian)(dian)(dian)(dian)(dian)(dian)腦領域。AT&T的(de)(de)瓦解過程開始于1984年(nian)。在美國(guo)(guo)(guo)政(zheng)府(fu)反壟斷政(zheng)策的(de)(de)強制干預(yu)下，公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)的(de)(de)本(ben)地(di)電(dian)(dian)(dian)(dian)(dian)(dian)話(hua)(hua)業務(wu)被(bei)分裂出(chu)去，重(zhong)新(xin)組建(jian)了7個(ge)(ge)子公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)，分別是：貝(bei)爾太平洋公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)、Ameritech公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)、貝(bei)爾西(xi)南(nan)公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)、貝(bei)爾西(xi)部美國(guo)(guo)(guo)公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)、貝(bei)爾大西(xi)洋公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)、貝(bei)爾南(nan)方公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)和Nynex公(gong)(gong)(gong)(gong)(gong)(gong)司(si)(si)(si)(si)(si)(si)。