| Acronym | Meaning |
| OTM | Occupational Training Manager |
| OTM | Ocean Systems Technician Maintainer (US Navy) |
| OTM | On-line Training Module |
| OTM | Open Tip Match (munitions) |
| OTM | Open Track Manager |
| OTM | Operations Training Manual |
| OTM | OSHA Technical Manual |
| OTM | Other Training Material |
| OTM | Out to Medical |
| OTM | Over Thirty Months (food supply criteria; UK) |