sign - spac
- sign post
- Signaal tracking and illumination radar (system)
- signal
- signal analysis
- signal analysis course
- signal analysis system
- signal analyzer
- signal analyzing monitor
- signal aviation branch
- signal aviation test support activity
- signal base deport
- signal battalion
- signal center
- Signal Center and School
- signal collection and jamming
- signal command
- signal communications
- signal company
- signal company (cable)
- signal company (wireless)
- signal company (with division)
- signal comparator
- Signal Corps
- Signal Corps Evans Laboratory
- Signal Corps General Development Laboratory
- Signal Corps General Research Laboratory
- Signal Corps Ground Signal Agency
- Signal Corps intermediate supply deport
- Signal Corps item
- Signal Corps laboratory
- Signal Corps Training Center
- signal data processing system
- signal data recorder
- signal data recording set
- signal depot
- signal distributing office
- Signal Division
- signal engineering laboratories
- Signal Equipment Support Agency
- signal exercise
