| Abbreviation | Definition |
|---|---|
| MTS | Member of the Technical Staff |
| MTS | Mission Team Specialist |
| MUA | Make-Up Artist |
| MVA | Market Value Appraiser |
| MVE | Most Valued Engineer |
| MVO | Motor Vehicle Operator |
| MW | Master Worker |
| MW | Multi Writer |
| MW | Mystery Worshipper |
| MWAH | Mommie Works At Home |
| MYA | Midwest Young Artist |
| MYW | Montgomery Youth Works |
| N | Naturalist |
| N | Negotiator |
| N | Nerd |
| N | Novelist |
| N | Nurse |
| NA | Nurse Anesthetist |
| NA | Nursing Assistant |
| NAC | Nursing Assistant Certified |