William J. Hannigan

AT&T Business Services provides business communication services to multinational corporations, small and midsized business clients, and government agencies. It offers networking, mobility, cloud, security, hosting, application management, unified communications, VPN, VoIP, and conferencing solutions for medium to large businesses. Its Global Networking Technology Services (GNTS) division offers voice and data services, such as private lines, special local access services and domestic, and international long-distance calling services. The company is headquartered in Dallas, TX.

Sabre Airline Solutions provides software technology solutions, products and services for airline reservations and departure control and consulting services. It distributes software solutions and consulting services through a sales and marketing organization that spans four continents, with primary sales offices in the Dallasa and Fort Worth area, London, Hong Kong and Sydney. The company was founded in 1960 and is headquartered in Southlake, TX.

Sabre, Inc. manufactures various types of cnc machines, precision, swiss screw machines and rotary transfer machines on contracts. The company is headquartered in Indianapolis, IN.

Kroll LLC provides global advisory services. It offers valuation advisory; governance, risk, investigation, and disputes; kroll cyber risk, corporates finance, and compliance and regulatory consulting. The company was founded by William Duff and George Phelps in 1932 and is headquartered in New York, NY.

SBC Communications, Inc. provides telecommunications services primarily in the United States. It offers various services and products, such as local exchange services, wireless communications, long-distance services, Internet services, telecommunications equipment, and directory advertising and publishing services. The company provides landline telecommunications services, such as local, long-distance voice, switched access, data and messaging services, and satellite television services; mobile wireless voice and data communications services; and directory services, such as advertising, Yellow and White Pages directories, and electronic directory publishing

Sabre Holdings Corp. provides tours and travel services. It also offers online reservations for airlines, hotels, cruises, car rental companies and vacation packages. The company is headquartered in Southlake, TX.

AT & T is the global leader in providing local, long distance, Internet, and transaction-based voice and data services. AT&T provides unparalleled quality and reliability in communications services