Before revision: Some military services (e.g., in the U.S. and the UK) use the term standing (rather than standard) operating procedure, since a military SOP refers to a unit's unique procedures, which are not necessarily standard to another unit.
After revision: Some military services (e.g., in the U.S. and the UK) use the term standing operating procedure, since a military SOP refers to a unit's unique procedures, which are not necessarily standard to another unit.