nothing by mouth
National Program Office
nil per os
Negative/POsitive zero
Network Performance Objectives
National Process Owner
National Production Organization
Navy Purchasing Office
Negative Positive 0
Negative Positive 0 temperature coeffi…
neurogenic pulmonary oedema
Neurotic Personality Organization
New Personnel Orientation
New Philharmonia Orchestra
New Product Opportunity
No Purchase Order
Non Per Os
North Pacific Ocean
North Pacific Oscillation
Novosibirsk Aviation Production Associ…
Nuclear Power Operator
Nuclear process operator
Nuclear Propulsion Office
nucleus pontis oralis
nucleus praeopticus
nucleus preopticus
Nurses Professional Organization
NWTS Program Office
Non-Profit Organization