Office Of Public Sector Information, the
From Longman Dictionary of Contemporary EnglishOffice Of Public Sector Information, the the Office Of Public Sector InformationˌOffice Of ˌPublic ˌSector Inforˈmation, the (abbreviation OPSI) the organization that is responsible for running Her Majesty’s Stationery Office (HMSO) and other public information services in the UK. It is part of The National Archives.