Estimated Time of Arrival 
Employment and Training Administration 
Event Tree Analysis 
Electronic Transportation Acquisition 
edited to add 
Electronic Travel Authority 
Electronics Technician Association 
Employment & Training Administration 
Engineering Test Article 
Environmental Test Article 
expected time of arrival 
Explosive Transfer Assembly 
Educational Television Association 
eigenstructure tracking analysis 
Electronic Tax Administration 
Electronic Technicians Association 
Emanation Thermal Analysis 
Energy Tax Act 
Estimated Time to Acquisition 
European Technical Approvals 
External Tank Attachment 
External Tank Attack 
External Task Agreement 
eicosa-5,8,11,14-tetraynoic acid 
eicosatetraynoic acid 
eicosatrienoic acid 
Electron Tunneling Accelerometer 
Electronic Test Automation 
Electronic Transactions Association 
Electronic Transfer Account