orga - para
- outside of track
- outside side stake car
- outside weld
- outstation
- outstroke
- outward transfer
- ovality
- over all payload ratio
- over caliber shell
- over expanded nozzle
- over horizon detection
- over pressurization
- over rich mixture
- over speed
- over speed device
- over the horison radar
- over the horizon capability
- over water performance
- over water range
- over weight
- overall characteristic length
- overall control loop
- overall dimension
- overall dimensions of equipment
- overall efficiency
- overall efficiency of the pump unit
- overall grounding loop
- overall height
- overall helicopter length with the rotors operating
- overall horse power
- overall length excluding rotors
- overall length with gun forward
- overall minefield plan
- overall missile body load
- overall national space program
- overall objective
- overall performance
- overall power consumption
- overall reliability
- overall sound pressure level
