on c - orga
- on call detonation
- on call service
- on coming traffic
- on course trajectory
- on duty time
- on line data processing system
- on line detection
- on line input
- on line processing
- on line processor
- on line transmission of seismic data
- on off action
- on off control
- on off control system
- on off controller
- on off mechanism
- on off mode
- on off push button
- on off ratio
- on off reaction jet
- on off signals
- on off switch
- on off valve
- on orbit flexibility
- on pad blast
- on pad explosion
- on pad fire
- on position
- on site ascertaining of relevant circumstances
- on site inspection
- on site investigation
- on site maintenance
- on site means of verification
- on site observation
- on site observers
- on site operational checkout
- on site test
- on site verification
- on tank fuel
- on the job training
