| Abbreviation | Definition |
|---|---|
| MTOA | Michigan Tactical Officers Association |
| MTPAS | Mobile Telephony Priority Access System |
| MTPD | Metro Transit Police Department |
| MTTF | Manhattan Traffic Task Force |
| MTU | Mobile Tactical Unit |
| MU | Mounted Unit |
| MuM | Murder under the Microscope |
| MVPD | Moraine Valley Police Department |
| MVPD | Mountain View - Police Department |
| N | Name |
| NABIS | National Ballistics Intelligence Service |
| NACOSS | National Approval COuncil for Security Systems |
| NACPO | National Association of Chief Police Officers |
| NACRO | National Association for the Care and Resettlement of Offenders |
| NAD | Name and Address Details |
| NAFIS | National Automatic Fingerprint Identification System |
| NAI | Non-Accidental Injury |
| NAIR | National Arrangements for Incidents involving Radioactivity |
| NAPBS | National Association of Professional Background Screeners |
| NAPD | National Academy of Police Diving |