| Acronym | Definition |
|---|
| NEO | Near Earth Object |
| NEO | Northeast Ohio |
| NEO | Neapolitan |
| NEO | New Employee Orientation |
| NEO | Neo-Adjuvant Chemotherapy |
| NEO | Nissan Ecology Oriented |
| NEO | New Economic Order |
| NEO | Newly Elected Official (various organizations) |
| NEO | Nelson Email Organizer |
| NEO | New Engine Option (aviation) |
| NEO | Noncombatant Evacuation Operation |
| NEO | Named Executive Officer |
| NEO | Network-Enabled Operations |
| NEO | National Exchange Officer |
| NEO | Non-Equity Option (finance) |
| NEO | Noncombatant Evacuation Order |
| NEO | New Earth Organization (Buck Rogers RPG) |
| NEO | Near Earth Objects Information Center |
| NEO | Nissan Ecology Oriented (engine technology) |
| NEO | Nursing Education Opportunities (US HRSA) |
| NEO | Nuclear Explosive Operations |
| NEO | Non Ejaculatory Orgasm |
| NEO | Northeast Oklahoma Railroad |
| NEO | Network Element Object |
| NEO | Northern Exposure Organics (Leaf Rapids, Manitoba, Canada) |
| NEO | Network Enterprise Objects (Sun) |
| NEO | NATO Eyes Only (NATO security classification) |
| NEO | NASA (National Aeronautics and Space Administration) Earth Observations (US NASA) |
| NEO | Northeast Orchestra |
| NEO | National Engineering Organization |