| Acronym | Definition |
|---|
| NAS | Network Attached Storage |
| NAS | National Academy of Sciences |
| NAS | Naval Air Station |
| NAS | New American Standard (bible version) |
| NAS | Network Access Server |
| NAS | Networked Attached Storage |
| NAS | National Airspace System |
| NAS | National Autistic Society (UK) |
| NAS | Norwegian Air Shuttle (Norwegian commercial air carrier) |
| NAS | National Association of Scholars |
| NAS | Naval Air Squadron (UK) |
| NAS | Natural and Applied Sciences (various universities) |
| NAS | Numéro d'Assurance Sociale |
| NAS | North American Stainless (various locations) |
| NAS | National Account Services (various companies) |
| NAS | Nagly Atak Spawacza (Polish: Suden Attack) |
| NAS | Neonatal Abstinence Syndrome (narcotics withdrawal problems) |
| NAS | National Archives of Scotland |
| NAS | Network Area Storage |
| NAS | Non Ansi Standard |
| NAS | Nbma Arp Server |
| NAS | Network Audio System |
| NAS | Needs Assessment Survey (various organizations) |
| NAS | NASA Advanced Supercomputing |
| NAS | Non-Access Stratum (3GPP) |
| NAS | National Accreditation Standards (Australia) |
| NAS | Numerical Aerodynamic Simulation |
| NAS | National Aerospace Standard (Department of Defense) |
| NAS | Narcotics Affairs Section (US Embassy) |
| NAS | Network Accessible Storage |
| NAS | New American Schools |
| NAS | Network Application Support |
| NAS | North American Specification (cars manufactured for North American market) |
| NAS | National American School |
| NAS | Netscape Application Server |
| NAS | Numerical Aerospace Simulation |
| NAS | No Added Salt (dietary) |
| NAS | Naval Audit Service (US Navy) |
| NAS | National Advanced Systems |
| NAS | Network Automation System (software) |
| NAS | Non-Caloric Artificial Sweetener |
| NAS | Network Attached Servers |
| NAS | Natural American Spirit (tobacco brand) |
| NAS | Network Access System (Sprint) |
| NAS | Narrowband Area Service (Australia) |
| NAS | Northern Aral Sea (project) |
| NAS | Network Analysis System (Alcatel) |
| NAS | National Automation Services (Nevada) |
| NAS | Not a Sentence (editing) |
| NAS | Networking Architecture and Storage (IEEE International Conference) |
| NAS | Non-Availability Statement |
| NAS | National Airports System (Canada) |
| NAS | Nerve Attenuation Syndrome (fictional disease) |
| NAS | Native American Spirit |
| NAS | New Attack Submarine |
| NAS | Network Administration System |
| NAS | National Aircraft Standard |
| NAS | Nikon Acquisition Syndrome (slang; urge to buy Nikon equipment or accessories) |
| NAS | Network Access Switch |
| NAS | National Audubon Society, Inc. |
| NAS | Nassau, Bahamas - Nassau International Airport (Airport Code) |
| NAS | National Accessibility Scheme |
| NAS | National Association of Seadogs |
| NAS | NetWare Access Services (Novell) |
| NAS | National Asthma Survey |
| NAS | National Arts Strategy (various organizations) |
| NAS | National Achievement Scholars |
| NAS | Nigerian Academy of Sciences |
| NAS | Naval Amphibious School |
| NAS | North Aegean Sea |
| NAS | Numerical and Atmospheric Sciences Network |
| NAS | Next Action Star (TV Show) |
| NAS | New Accession States |
| NAS | Neuroanaesthesia Society (Birmingham, UK) |
| NAS | Narcotics Assistance Section |
| NAS | New Associated States |
| NAS | NAS Area Supervisor (FAA) |
| NAS | Non Aliter Specificatus (Latin: Not Further Specified) |
| NAS | Nuclear Assembly System |
| NAS | Not-A-Spinoff |
| NAS | Naval Auxiliary Ship |
| NAS | National Acceptance Scheme for CPDW (EU) |
| NAS | Node Avionics Simulator |
| NAS | Narrow Band Acquisition Qualifier Subsystem |
| NAS | National Aerodynamic Simulator |
| NAS | NORAD Alerting System |
| NAS | Need Analysis Servicer (US Department of Education) |
| NAS | National Airspace Study |
| NAS | Nonaccelerating Securities |
| NAS | Nozzle Actuating System |
| NAS | NBMA (Non-Broadcast Multiple Access) ARP (Address Resolution Protocol) Server |