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美国电话电报公司，AT&T，创于1877年，世界500强，曾长期垄断美国长途和本地电话市场，世界较大的无线电话生产商，AT&T商标为AT&T知识产权所拥有的商标，授权予香港伟易达通讯设备有限公司使用

AT&T公司（英语：AT&T Inc.，原为American Telephone & Telegraph的缩写，也是中文译名美国电话电报公司由来，但近年来已不用全名），是一家美国电信公司，创建于1877年。 AT&T在近120年中，曾经过多次分拆和重组。 AT&T也是是美国NBA联盟圣安东尼奥马刺的球馆英语名AT&T Center。

美国电话电报公司有8个主要部门 ：贝尔实验室、商业市场集团、数据系统公司 、通用市场集团 、网络运营集团、网络系统集团、技术系统集团、公司国际集团。主要业务是：为国内国际提供电话服务。利用海底电缆、海底光缆、通信卫星，可联系250个国家和地区，147个国家和地区可直接拨号。提供商业机器、数据类产品和消费类产品。提供电信网络系统。各种服务及租赁业务。它还为政府提供产品和服务。该公司非常重视科研和开发新产品。美国电话电报公司在泰国、德国、新加坡等地设有工厂。在意大利、韩国、日本等国设有子公司或者合资公司。1995年9月，该公司解体为三个独立的公司：通讯服务公司、通讯设备公司、电脑信息服务公司，并且退出个人电脑领域。AT&T的瓦解过程开始于1984年。在美国政府反垄断政策的强制干预下，公司的本地电话业务被分裂出去，重新组建了7个子公司，分别是：贝尔太平洋公司、Ameritech公司、贝尔西南公司、贝尔西部美国公司、贝尔大西洋公司、贝尔南方公司和Nynex公司。

At & T, founded in 1877, is one of the world's top 500 companies. It has long monopolized the long-distance and local telephone market in the United States. The world's largest wireless phone manufacturer, at & T trademark is a trademark owned by at & T intellectual property rights, which is authorized to Hong Kong Weiyida communication equipment Co., Ltd. to use at & T company (English: at & tinc., formerly American Telephone & amp; Telegraph, the abbreviation of which is also the origin of the Chinese translation of at & T, but in recent years it has not used its full name), is an American Telecommunication Company, founded in 1877. At & T has split up and reorganized many times in the past 120 years. At & T is also the English name at & T center of San Antonio Spurs in NBA. At & T has eight main departments: Bell Labs, commercial markets, data systems, general markets, network operations, network systems, technology systems, and corporate international. The main business is: to provide telephone services for domestic and international. With submarine cable, submarine optical cable and communication satellite, 250 countries and regions can be contacted and 147 countries and regions can be dialled directly. Provide business machines, data products and consumer products. Provide telecommunication network system. Various services and leasing business. It also provides products and services to the government. The company attaches great importance to research and development of new products. At & T has factories in Thailand, Germany and Singapore. It has subsidiaries or joint ventures in Italy, South Korea, Japan and other countries. In September 1995, the company disintegrated into three independent companies: communication service company, communication equipment company, computer information service company, and withdrew from the field of personal computers. The collapse of at & T began in 1984. Under the compulsory intervention of the anti-monopoly policy of the U.S. government, the local telephone business of the company was split and seven subsidiaries were reorganized, namely, bell Pacific Company, AMERITECH company, bell Southwest Company, bell West America company, Bell Atlantic company, bell south company and Nynex company.

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