HMSO, or Her Majesty's Stationery Office, is a British government office that has gone through multiple name changes over the years. Some synonyms for HMSO include the National Printing Office, His/Her Majesty's Printing and Stationery Office, and The Stationery Office. These name changes have been reflective of shifts in the office's responsibilities, which have included publishing official government documents, managing the sale of government publications, and providing stationery and printing services to government departments. Despite these changes, the core purpose of HMSO remains the same: to provide high-quality, reliable services to support the operations of the British government.