orga - para
- organ of equilibrium
- organic catalyst
- organic coating
- organic matter
- organic nitropolymer
- organic resin
- organic screen
- organic solvent
- organic tank
- organic tank weapons
- organic transport
- organization and personnel division
- organizational equipment
- organizational maintenance
- organizational maintenance personnel
- organizational maintenance test equipment
- organizational maintenance test station
- organizational operational personnel
- organizational repair
- organized ground
- organometallic
- organophosphate agents
- organophosphate compounds
- organophosphorous agents
- orient airlines research bureau
- orientation
- orientation by back sight
- orientation by the aid of a map
- orientation data
- orientation device
- orientation equipment
- orientation error
- orientation fault
- orientation system engine
- orientation time
- orientation tracking and range system
- oriented filament
- oriented graphite
- orienting thrust engine
- orifice coefficient
