Nuclear Thermal Rocket
Nothing to Report
Net Time Reference
Nuclear Test Reactor
Enter
Mississippi Central Railroad
NADP-thioredoxin reductase
Natchez Trace Railroad
National Testing Range
National Toxics Rule
National Track Renewals
National Transport Rotorcraft
Naval Technical Representative
near total resection
negative for p75
negative therapeutic reaction
Netherlands Twin Register
netrin
Network Time Reference
Network Timing Reference
Network Traceable Reference
neurotensin receptor
neurotrophin receptor
neurotrophin receptor p75
New York Mortgage Trust Inc
Next Task Register
nitrendipine
nitrogen regulation
nitrogen regulatory
nitrogen regulatory system