| Rank | Abbreviation | Meaning |
|---|
| ***** | OTPC | Of the Time by Public
| |
| ***** | OTPC | ONGC (Oil and Natural Gas Corporation) Tripura Power Company
| |
| **** | OTPC | One Textbook per Child
| |
| **** | OTPC | Occupational Therapy Practice Checklist
| |
| **** | OTPC | Ohio Table Pad Company
| |
| **** | OTPC | Office of Tobacco Prevention and Control
| |
| **** | OTPC | Oliver Tyrone Pulver Corporation
| |
| **** | OTPC | Occupational Testing Performance Center
| |
| *** | OTPC | ONGC Tripura Power Corporation
| |
| *** | OTPC | Ocon Termite and Pest Control
| |
| *** | OTPC | Oklahoma Turning Point Council
| |
| *** | OTPC | Otter Tail Power Company
| |
| ** | OTPC | Orientation to Pony Club
| |
| * | OTPC | Orrville Turning Point Coalition
| |
| * | OTPC | Optical Time Projection Chamber
| |