Network Encryption System 
Network Encryption Server 
Noise Equivalent Signal 
National Exploitation System 
not elsewhere specified 
National Energy Strategy 
National Engineering Service 
Nintendo Entertainment System 
National Education Supercomputer 
Network Element Switching 
Network Event Schedule 
neurobehavioral evaluation system 
Never Ending Story 
nuclear export signal 
NAIS Email Service 
Naples Elementary School 
Naranca Elementary School 
Narrative Evaluation System 
NASA Explorer School 
National Education Seminar 
National Election Studies 
National Employment Service 
National Encryption System 
National Engineering Scholarship 
National Engineering Specification 
National Enuresis Society 
National Environment Secretariat 
National Ergonomic Society 
National Estimating Society 
National Eutrophication Survey