Environmental Control System 
Electronic Certification System 
European Communications Satellite 
Electronic Crash Sensor 
Emission Control System 
Elitegroup Computer Systems 
Electronic Chart Systems 
Enterprise Communications Server 
European Communications Satellites 
Embedded Computer Systems 
Energy Conversion Subsystem 
Environmental Conditioning System 
Environmental Control Subsystem 
Environmental Control Systems 
EOSDIS Core System 
Experimental Communications Satellite 
EXTENDED CORE STORAGE 
Electronic Chart System 
Electronic Commerce Service 
Elitegroup Computer Systeme 
Emissions Control System 
Empty Coaching Stock 
Enhanced Chip Set 
European Communication Satellite 
Eagle Creek Systems, Inc. 
Early Communications Subsystem 
Early Communications System 
Eberron Campaign Setting 
EComStation 
Electrical and Communications Systems