| Acronym | Definition |
|---|
| NOA | Nintendo Of America |
| NOA | National Observatory of Athens (Athens, Greece) |
| NOA | National Orientation Agency (Nigeria) |
| NOA | Notice Of Availability |
| NOA | Notice of Award |
| NOA | Notification of Award (various organizations) |
| NOA | Notice of Acceptance (Miami-Dade County Building Code Compliance Office) |
| NOA | Notice of Action |
| NOA | Noroeste Argentino (Spanish: Argentine North West Region) |
| NOA | Night of Artists (event and magazine) |
| NOA | Net on Air |
| NOA | Nature of Address |
| NOA | National Obituary Archive (Jonesboro, AR) |
| NOA | National Olympic Academy (various locations) |
| NOA | Notice of Assessment |
| NOA | Number of Ancestors (computing) |
| NOA | Naturally Occurring Asbestos |
| NOA | None of the Above (Wristwatch Brand) |
| NOA | Nature Of Action |
| NOA | Notice of Allowance (US Patent and Trademark Office) |
| NOA | Notice of Arrival (US Coast Guard) |
| NOA | Net Operating Assets |
| NOA | North Atlantic Oscillation |
| NOA | Number of Attributes |
| NOA | National Optometric Association |
| NOA | Natural Ontological Attitude (philosophy) |
| NOA | Nonobstructive Azoospermia |
| NOA | Nature of Address (Cisco) |
| NOA | National Onion Association |
| NOA | New Obligation Authority |
| NOA | Notice of Assignment |
| NOA | New Orleans Arena |
| NOA | Notification of Personnel Action |
| NOA | Nebraska Optometric Association |
| NOA | New Orleans Association (New Orleans, LA) |
| NOA | Nintendo of Australia |
| NOA | New Obligational Authority |
| NOA | New Operational Automation System (Japan) |
| NOA | Naturaleza Organización y Ambiente (Spanish: Nature and Environment Organization; Guatemala) |
| NOA | Norwegians of America (gaming clan) |
| NOA | Notes on Anthropology (journal) |
| NOA | Navy Open Architecture (US Navy) |
| NOA | Not Otherwise Authorized |
| NOA | Northwest Orient Airlines |
| NOA | Nevada Optometric Association |
| NOA | Notice of Adjustment |
| NOA | Network Outsourcing Association |
| NOA | Notify on Arrival |
| NOA | Network Optical Access (Digital Lightwave) |
| NOA | Naval Operating Areas |
| NOA | National Operational Agency (Germany) |
| NOA | National Oceanography Association |
| NOA | Networked Office Appliance (Ricoh) |
| NOA | Non-Operating Aircraft |