spac - SSEI
- space
- space activity suit
- space and astronautics orientation course
- Space and Missile System Organization
- Space and Missile Systems Organization
- Space and Missile Test Center
- space and missile test center
- space and missile test organization
- space and missile tracking system
- Space and Naval Warfare Systems Command
- space base
- Space Command
- space communication system
- space communications
- space communications network
- space communications station operation
- space defense
- space defense center
- space defense operations center
- space defense project office
- space defense system
- space detection and tracking system
- space detection network
- space division
- space early warning (system)
- space electric rocket tests
- space flight operations facility
- space intercept
- space laser energy detector
- space launch complex
- space medicine advisory group
- space nuclear power system
- space nuclear propulsion
- space nuclear system
- Space Nuclear Systems Office
- space object identification system
- space object surveillance and identification program
- space objects identification
- space operations center
- space operations controller
