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AT&T Inc., based in San Antonio, Texas, provides telecommunication services and products to residential, business, and governmental customers primarily in the United States and internationally. Its services include local exchange services, long-distance services, wireless communications, data/broadband and Internet services, managed networking, wholesale services, directory advertising and publishing, and sale of telecommunications equipment.  Bloomberg, headquartered in NY, provides business and financial professionals with the tools and data they need on a single, all-inclusive platform. Bloomberg offers sophisticated trading tool and services as well as trading systems in addition to operating the largest privately owned network in the world. These networks are actively managed by people who understand the need for fast, resilient and secure networks in the financial markets. Bloomberg brings several products to the financial information markets such as Bloomberg terminal, Bloomberg B-Unit, Bloomberg Keyboard, Bloomberg for Blackberry.  Microsoft Corporation, headquartered in Redmond, Washington, provides software products for computing devices worldwide. It has several segments of operation such as Client segment, the Server and Tools segment and Online Services Business segment. Microsoft’s Online Services Business segment offers personal communications services, such as email and instant messaging, and online information. Its Business Division offers enterprise content management, collaboration, unified communications, and business intelligence products. Microsoft Dynamics products offer business solutions for financial management, customer relationship management, supply chain management, and analytics applications.  Research In Motion Limited (RIM) is headquartered in Waterloo, Canada. RIM designs, manufactures, and markets wireless solutions for the mobile communications market worldwide. RIM’s portfolio of products includes BlackBerry wireless platform, the RIM Wireless Handhelds product line, software development tools, radio-modems, and other hardware and software products. RIM’s BlackBerry wireless solution comprises wireless devices, software, and services. The company offers technology that enables third party developers and manufacturers to enhance their products and services with wireless connectivity to data. 
Symantec Corporation, headquartered in Cupertino, California, provides software and services for information security, availability, compliance, information technology, and systems performance. Symantec provides businesses with solutions for compliance and security management, endpoint security, messaging management and data protection management.
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