| Abbreviation | Definition |
|---|---|
| PTDC | Paul Taylor Dance Company |
| PTDC | Pawnee Tribal Development Corporation |
| PTDC | Puducherry Tourism Development Corporation |
| PTDC | Punjab Tourism Development Corporation |
| PTE | Private Training Establishment |
| PTF | ProTerra Foundation |
| PTF | ProTerra Foundation |
| PTFP | PrettyThingsFromPickle |
| PTH | Pagan Tea House |
| PTHC | Palm Trademark Holding Company |
| PTI | Paper Transport Inc |
| PTI | Plastic Technologies Inc |
| PTI | Polymer Technologies Inc |
| PTI | Positive Technologies, Inc. |
| PTI | Power Technologies Incorporated |
| PTI | Professional Transportation Inc |
| PTI | Professional Transportation, Incorporated |
| PTI | Proteostasis Therapeutics Inc |
| PTI | Technologies Inc |
| PTIN | Postini Threat Identification Network |