European Space Agency 
Endangered Species Act 
Employment Standards Administration 
European Space Agency's 
Earth Sensor Assembly 
Environmental Site Assessment 
Ecological Society of America 
electronically scanned array 
Electronically Steered Array 
Enterprise Systems Architecture 
Economics and Statistics Administratio… 
Engineering Support Activity 
Engineering Support Area 
Enterprise Security Analyzer 
Entertainment Software Association 
Environmentally Sensitive Area 
excited state absorption 
Explosive Safe Area 
Education Savings Account 
electronically-scanned array 
Engineering Supply Area 
Engineering SuPPort Assembly 
Enterprise Software Agreement 
Enterprise System Architecture 
Economic Services Administration 
electrokinetic sonic amplitude 
electron stimulated adsorption 
Electronic Spectrum Analyzer 
Electronic Systems Analyst 
Electronically Scanned Antenna