| Abbreviation | Definition |
|---|---|
| OSP | Operational Service Provider |
| OSP | Operations Standard Practice |
| OSQ | Office Supplies Quick |
| OSR | Organization Systems Renewal |
| OSS | One Stop Service |
| OSS | One Stop Shopping |
| OSS | On-line Service System |
| OSSA | On- Site Service Agreement |
| OSSS | Operational Space Services and Support |
| OSTT | Organizational Systems Technology Training |
| OT | Obsolete Thinking |
| OT | Occupational Therapy |
| OT | Office Tower |
| OT | Omega Team |
| OT | On Target |
| OT | Option Taken |
| OT | Over Top |
| OT | overtime |
| OTA | Online Travel Agents |
| OTB | On The Ball |