| Acronym | Definition |
|---|
| NTA | National Testing Agency (India) |
| NTA | National Television Awards |
| NTA | Nigerian Television Authority |
| NTA | Nigerian Television Authority (Nigeria) |
| NTA | Nippon Travel Agency (Japan) |
| NTA | Net Tangible Asset |
| NTA | Nitrilotriacetic Acid |
| NTA | National Tax Agency (Japan) |
| NTA | National Tour Association |
| NTA | National Treatment Agency (for Substance Misuse; UK) |
| NTA | Native Title Act (Australia) |
| NTA | National Tutoring Association |
| NTA | Notice To Appear |
| NTA | National Timing Authority |
| NTA | Network Traffic Analyzer |
| NTA | Network Tree Allocator |
| NTA | No Temporary Register Available |
| NTA | Non Technical Acronym |
| NTA | Network Traffic Analyzer (software) |
| NTA | National Taxpayer Advocate (US IRS) |
| NTA | National Trappers Association |
| NTA | National Training Authority (various locations) |
| NTA | National Telecommunications Authority (various locations) |
| NTA | National Transportation Agency (Canada) |
| NTA | National Technical Association |
| NTA | National Textile Association |
| NTA | Nitrogen Tank Assembly |
| NTA | Non-Teaching Assistant |
| NTA | Notice to Applicants (EU) |
| NTA | National Technology Alliance |
| NTA | National Tennis Academy |
| NTA | Non-Traditional Agent |
| NTA | Nevada Telecommunications Association |
| NTA | Northern Training Area |
| NTA | Nebraska Trucking Association |
| NTA | National Tuberculosis Association (1919-1967) |
| NTA | Nothing to Add |
| NTA | North to Alaska (TV) |
| NTA | Northern Textile Association |
| NTA | National Translator Association |
| NTA | Namibia Training Authority (est. 2008) |
| NTA | Network on Transitions to Adulthood |
| NTA | Network Technical Architecture (Sprint) |
| NTA | Neutral Torque Axis (vehicle feature) |
| NTA | Network Technology Architecture |
| NTA | National Truckers Association |
| NTA | Nebraska Telecommunications Association |
| NTA | National Thoroughbred Association |
| NTA | Navy Technical Authority (US DoD) |
| NTA | Nuclear Test Aircraft |
| NTA | National Teachers Association for Country Western Dance |
| NTA | National Trivia Association (pub trivia organization) |
| NTA | Norwegian Telecommunications Administration |
| NTA | National Towing Alliance |
| NTA | Noobtoob Army (gaming group) |
| NTA | Navy Tactical Task (Navy Mission Essential Task List) |
| NTA | North American Transportation Association |
| NTA | Nuclear Track A (film) |
| NTA | Near Term Architecture (Bellcore) |
| NTA | Novel Threat Agent |
| NTA | Nantucket Tasters' Association |
| NTA | News Transmission Assistant |
| NTA | Nuclear Target Analysis |
| NTA | Non-Traditional Advertising |
| NTA | Northwest Trail Riders Association |
| NTA | Naval Training Administration |
| NTA | Net Technical Assessment |
| NTA | Nielsen Television Area |