OTPA
| Acronym | Definition |
|---|---|
| OTPA | Ought to Pass with Amendment (New Hampshire) |
| OTPA | Old Towne Preservation Association (Orange, CA) |
| OTPA | Office of Tax Policy Analysis (various locations) |
| OTPA | One Time Password Authentication |
| OTPA | Out-of-Turn Plan Amendment |
| OTPA | Optically-Tuned Patch Antenna |
| OTPA | Office of Technology and Policy Analysis (US DOC) |