A CIA operative may have a need to discreetly reveal his or her origins; for example, if a CIA agent is embedded in a friendly military expeditionary unit, the agent will need the co-operation of the unit in order to successfully conduct operations. On the other hand, the agent must maintain as much secrecy as possible and cannot brag about his or her origins. The agent might therefore refer to him or herself as 'OGA'.
The term is frequently referenced in popular espionage fiction such as the works of Tom Clancy.
For U.S. importers, OGA also refers to 'Other Government Agencies' with respect to U.S. Customs and Border Protection. OGAs include the United States Environmental Protection Agency (EPA), the Food and Drug Administration (FDA), the Fish and Wildlife Service (FWS), the Federal Communications Commission (FCC) and the Department of Transportation (DOT). Canada refers to theirs as OGD for Other Government Departments.