| Acronym | Definition |
|---|
| NOS➣Not Otherwise Specified |
| NOS➣Network Operating System |
| NOS➣National Ocean Service (NOAA) |
| NOS➣National Occupational Standards (UK) |
| NOS➣Nitric Oxide Synthase |
| NOS➣Notice of Suspension (various meanings) |
| NOS➣New Orleans Saints |
| NOS➣Nosferatu (vampire reference) |
| NOS➣Newcastle-Ottawa Scale (public health quality assessment; Canada) |
| NOS➣New Old Stock |
| NOS➣Non-Oversampling (digital audio converter) |
| NOS➣Notice of Sale |
| NOS➣Nitrous Oxide System |
| NOS➣National Osteoporosis Society (UK) |
| NOS➣Nederlandse Omroep Stichting |
| NOS➣Never on Sunday |
| NOS➣Nippon Office Systems (Japan) |
| NOS➣National Orange Show (San Bernardino, CA) |
| NOS➣Network Operations Squadron (US Air Force) |
| NOS➣National Open School |
| NOS➣not Off Set |
| NOS➣Netware Operating System |
| NOS➣Non Delay Overclocking System |
| NOS➣Nitro Oxide System |
| NOS➣not of Specific Origin |
| NOS➣Notes Object Services |
| NOS➣Number of Statements |
| NOS➣Number Of Sectors |
| NOS➣National Ocean Survey (NOAA) |
| NOS➣Nature of Suit (legal) |
| NOS➣Natural Orifice Surgery (Transdouglas technique) |
| NOS➣Net One Systems (Japan) |
| NOS➣New Orleans Square (Disneyland) |
| NOS➣Never Out of Stock |
| NOS➣Non-Oily Solid |
| NOS➣No Other Symptoms |
| NOS➣Naval Ordnance Station |
| NOS➣Not on Shelf |
| NOS➣NATO Office of Security |
| NOS➣Not on Schedule |
| NOS➣New Old Stuff |
| NOS➣National Ocean Science |
| NOS➣No One Survives (gaming team) |
| NOS➣Novell Operating System |
| NOS➣Network Optimization System (Sprint) |
| NOS➣Night Observation System |
| NOS➣Not One Scratch (condition of items for sale) |
| NOS➣Next on Stack |
| NOS➣Net Outside Sales |
| NOS➣Network Optimization Support (Cisco) |
| NOS➣National Orthodox School (Amman, Jordan) |
| NOS➣Network Operations Specialist (Sprint) |
| NOS➣Notification of Sourcing |
| NOS➣No Organism Seen (medical/microbiology reference) |
| NOS➣Non Operational Primitive Sequence |
| NOS➣Nuke On Sight |
| NOS➣Non-Organic Substance |
| NOS➣Contract for Bureau of Supplies and Accounts (US Navy) |
| NOS➣Northern Tropospheric Oxidants Study |
| NOS➣Naval Observatory Station (astronomy and astrophysics; Flagstaff, AZ) |
| NOS➣Network Operations Superintendent (railway specialist) |
| NOS➣Nucleus of Spheres (gaming, Dungeons & Dragons) |