forward operating base (FOB)

naval base; naval operating base

base junction; rotary collector ring (box); rotary base junction (of a tank); rotary connection; slip ring; traverse rotary base junction

deployment operating base

emergency fleet operating base

naval operating base (fixed or temporary)

main operating base

base operating supply system (BOSS)

forward observer (FO), forward observation officer; (artillery) observer / spotter

forward base

forward mounting base (FMB)

forward support base

defense industrial base / military-industrial base

battlefield operating system (BOS)

buffer and operating-rod group

common operating environment (COE)

contemporary operational environment / contemporary operating environment (COE)

ground operating equipment

missile operating area

operating environment (OE)

operating forces

operating forces of the Navy

operating frequency

operating mechanism

operating principle

operating procedures

operating rod assembly

operating rod group

operating speed

operating stocks; working stock

operating tempo (OPTEMPO)

standard operating procedure(s) (SOP)

standing operating procedure (SOP)