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The Andrade Gutierrez Group has a renowned history of competence and creativity in the execution of large enterprises in Brazil and throughout the world. Founded in 1948 in Belo Horizonte, Brazil, the Group is one of the largest private groups in Latin America, with operations in Engineering and Construction, Telecommunications, Power, and Public Concessions. The AG Group operates according to strategies of business generation, quality, long-term growth, integration with the communities, local employee value and development, and commitment to environmental balance. Today, the Group is a corporation fully adapted to the latest international trends, with the flexibility to establish partnerships, to identify opportunities in the industries in which we operate, and to establish contracts in diverse modalities.

AT&T is bringing it all together for our customers, from the revolutionary iPhone 4 to next-generation TV services and sophisticated solutions for multi-national businesses. For more than a century, we have consistently provided innovative, reliable, high-quality products and services and excellent customer care. Today, our mission is to connect people with their world, everywhere they live and work, and do it better than anyone else. We're fulfilling this vision by creating new solutions for consumers and businesses and by driving innovation in the communications and entertainment industry. We're recognized as one of the leading worldwide providers of IP-based communications services to businesses. We also have the nation's fastest mobile broadband network and the largest international coverage of any U.S. wireless carrier, offering the most phones that work in the most countries; the largest Wi-Fi network in the United States; and the largest number of high speed Internet access subscribers in the United States.

Through its subsidiaries, affiliates, and operating companies, holding company AT&T is the industry-leading provider of wireline voice communications services in the US. Customers in 22 states use AT&T-branded telephone, Internet, and computer telephone services; it also sells digital TV under the U-verse brand. Key markets include California, Illinois, and Texas. The company's corporate, government, and public sector clients use its range of conferencing, managed network, and wholesale communications services. Subsidiary AT&T Mobility is the nation's second-largest wireless carrier by both sales and subscriptions (after Verizon Wireless). It provides mobile voice and data services to about 85 million subscribers.

Atlantic Tele-Network (ATN) makes connections from the rain forests of Guyana to the maple groves of Vermont. ATN owns 80% of mobile phone carrier Guyana Telephone & Telegraph (GT&T), which has about 150,000 fixed access telephone lines and has about 290,000 cellular subscribers. In the US, ATN provides wholesale wireless voice and data roaming services to local and national communications carriers through subsidiary Commnet. The company provides voice and broadband Internet communcations services in New England, particularly in the state of Vermont, through its SoVerNet subsidiary. SoVerNet subsidiary ION offers fiber optic transport services in New York State on a wholesale basis.

Audiovisual was Founded in 1974, AVI Systems is an audio visual systems integrator focused on building professional solutions for business, commercial, educational and government clients. With offices in 9 states throughout the upper Midwest and in southern California, we have both a regional presence and a nationwide scope of operation.

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