on c - orga
- operational requirement
- operational requirements
- operational satellite
- operational sensor
- operational sequence
- operational sequence diagram
- operational shelter
- operational silo test facility
- operational site
- operational space equipment
- operational standards
- operational suitability test
- operational suitability test facility
- operational support equipment
- operational support requirements
- operational system
- operational takeoff weight
- operational test
- operational training
- operational unit
- operational up time
- operational warhead
- operational weight
- operationally configured training facility
- operations
- operations analysis center
- operations and control center building
- operations chief
- operations department
- operations directive
- operations engineering group
- operations group
- operations manager
- operations order
- operations range support group
- operations research society of america
- operations room
- operator
- operator error
- operator's cabin
