AT&T

One of the largest telecommunications and networking companies, AT&T has also entered the entertainment and communications industry, providing next-generation television services.

Accenture

Accenture is now a global management consulting, technology services and outsourcing company with offices and operations in more than 200 cities in 52 countries.

Alcatel-Lucent

Alcatel-Lucent today provides hardware, software and services to telecommunications services providers and enterprises around the world.

Atos Origin

Atos Origin has had the honour of designing, building and operating IT systems for the Olympic Games since the Salt Lake City Winter Olympics in 2002.

British Telecom

Telecommunications giant British Telecom, more commonly known as BT, serves businesses and home users in more than 170 countries.

CSC

CSC, a company that was started with "a hundred dollars and a dream" in 1959, has grown to become a major provider of IT services such as systems integration, outsourcing, Web and application hosting.

Capgemini

Paris-based consulting, technology and outsourcing services provider Capgemini now serves customer in more than 36 countries.

Cisco Systems

While Cisco Systems' core development areas continue to be in routing and switching, it also provides advanced technologies such as IP communications, application networking services and network security.

Ericsson

Over 1,000 networks in 140 countries use Ericsson's network equipment and 40 percent of all mobile calls are made through the company's systems.

Fujitsu

Established in 1935 and headquartered in Tokyo, IT services provider Fujitsu employs 167,000 people globally.

Google

Google, the California-based company established in 1998, has become a name that is synonymous with "online search".

Hewlett-Packard

Founded in 1939. Hewlett-Packard now operates in more than 170 countries providing printing and computing products, as well as IT services and software.

IBM

IBM, whose businesses include software, storage, servers and services, has also ventured into new areas such as environmental, social networking and "cloud computing" technologies.

Infosys

The first Indian company to be listed on Nasdaq, Infosys today generates revenues of over US$4 billion, providing business and IT consulting services to businesses.

LogicaCMG

The Anglo-Dutch company provides business consulting and systems integration as well as IT and business process outsourcing services across 36 countries.

NEC

NEC is a leading provider of information technology and network products, and ranks among the world's top 20 chip makers.

Satyam Computer Services

Established in 1987, India's Satyam provides consulting, enterprise business, application development and engineering services to customers around the world.

Siemens IT Solutions & Services

Siemens IT Solutions and Services provides a range of IT services, from consulting to system integration, right through to the management of IT infrastructures.

SingTel Group

SingTel has a history that traces back to 1879 when Singapore became one of the first cities in Asia to have telephone services, three years after the technology was patented by Alexander Graham Bell.

Sun Microsystems

A proponent of open systems and Unix, Sun Microsystems is also a major contributor to open source.

Tata Consultancy Services

Founded in 1968, Tata Consultancy Services is one of the oldest providers of IT and business process outsourcing services in India.

Wipro

Founded in 1945, Wipro started off as a fast moving consumer goods (FMCG) company that produced oil and laundry soap, and later diversified into the IT business in 1980.