CGI originally stood for "Conseillers en Gestion et Informatique" (and in English, it stood for "Consultants to Government and Industries"). CGI went public in 1986 with a primary listing on the Toronto Stock Exchange. After almost doubling in size with the 1998 acquisition of Bell Sygma, CGI acquired IMRGlobal in 2001 for $438 million, which added "global delivery options" for CGI. Other significant purchases include American Management Systems (AMS) for $858 million in 2004, which grew CGI's presence in the United States, Europe and Australia and led to the formation of the CGI Federal division.
CGI Federal's 2010 acquisition of Stanley, Inc. for $1.07 billion almost doubled CGI's presence in the United States, and expanded CGI into defense and intelligence contracts. In 2012, CGI acquired Logica for $2.7 billion Canadian, making CGI the fifth-largest independent business processes and IT services provider in the world, and the biggest tech firm in Canada. As of 2017 CGI is based in forty countries with around 400 offices, and employs approximately 70,000 people.
Services provided by CGI as of 2018 include application services, business consulting, business process services, IT infrastructure services, IT outsourcing services, and systems integration services, among others. CGI has customers in a wide array of industries and markets, with many in financial services. CGI also develops products and services for markets such as telecommunications, health, manufacturing, oil and gas, posts and logistics, retail and consumer services, transportation, and utilities. Clients include both private entities and central governments, state, provincial and local governments, and government departments dealing with defense, intelligence, space, health, human services, public safety, justice, tax, revenue and collections.
According to en.wikipedia.org