| Abbreviation | Definition |
|---|---|
| PTIS | Packaging Technology Integrated Solutions |
| PTJ | PolTeeJog International |
| PTL | Phantomore Technologies Limited |
| PTL | Pittsburgh Testing Laboratory |
| PTL | Pretax Loss |
| PTM | Personal Travel Market |
| PTMC | Polyplast Trading and Manufacturing Company |
| PTML | Pak Telecom Mobile Limited |
| PTML | Pakistan Telecommunications Mobile, LTD. |
| PTN | Philips Telecom and Networking |
| PTN | Preservation Trades Network, Inc. |
| PTNA | Pirelli Tire North America |
| PTNA | Power Tools North America (Robert Bosch North America division) |
| PTNI | Pipeline Trans-Nord Inc. |
| PTP | Personal Touch Photography |
| PTP | Piedmont Triad Partnership |
| PTP | Public Training Provider |
| PTPC | Port Townsend Paper Company |
| PTPC | Port Townsend Paper Corporation |
| PTPG | Peoria Tazewell Pathology Group |