Senior Executive Service 
Severely Errored Seconds 
Service Engine Soon 
Severely Errored Second 
Supplemental Education Services 
service elements 
Supplemental Educational Services 
socio-economic status 
Special Emphasis Study 
supplemental educ svcs 
Surface Effect Ship 
Surface Effects Ship 
Shuttle Engineering Simulator 
Single European Sky 
Standards Engineering Society 
Stock Exchange of Singapore 
Systems Engineering Simulator 
Ship Earth Station 
Shuttle Engineering Simulation 
Society of Engineering Science 
Softcopy Exploitation Segment 
Space Environmental Simulator 
State Emergency Service 
Strategic Engineering Survey 
Suffield Experimental Station 
Satellite Earth Station 
Satellite Earth Stations 
Secondary Electron Spectroscopy 
Secondary Emissions Standard 
Security Enabling Services