Certified Enrollment Specialist 
Civilian Education System 
Consumer Electronics Show 
Circuit Emulation Service 
character encoding scheme 
Coast Earth Station 
Cooperative Extension Service 
Cessna 
Church Educational System 
Circuit Emulation Services 
Civil Engineer Squadron 
Commonwealth Employment Service 
Consumer Electronic Show 
Committee on Earth Sciences 
Connection Endpoint Suffix 
Control Electronics System 
Crew Escape System 
Critical experiment station 
Center for Environmental Studies 
Circuit Emulation Switching 
Civil Engineering Squadron 
Coast Earth Stations 
Cognitive Environment Simulator 
Comite Electrotechnique Suisse 
Committee on Earth Science 
Common Equipment Set 
Computer Engineering Systems 
Conical Earth Sensor 
Consumer Expenditure Survey 
Cooperative Extension System