| Abbreviation | Definition |
|---|---|
| PSRC | PrimeSource Corporation |
| PSSF | Pacific State Bank of San Francisco |
| PSSF | Pacific State Bank of San Francisco (de-listed) |
| PSSF | Pacific State Bank of San Francisco (de-listed) |
| PSSI | P S S World Medical, Inc. |
| PSSS | P S S, Inc. |
| PSTA | Monterey Pasta Company |
| PSTF | Professional Staff, P. L. C. |
| PSTI | Per-Se Technologies, Inc. |
| PSTLS | Petrie Stores Liquidation Trust |
| PSUN | Pacific Sunwear of California |
| PSVF | Peoples Savings Financial Corporation of Pennsylvania |
| PSVG | Crys- Tel Communications |
| PSWT | P S W Technology, Inc. |
| PSYCE | Sykes Datatronics, Inc. |
| PSYS | Precision Systems, Inc. |
| PTBS | Potomac Bancshares, Inc. |
| PTCH | Pacer Technology, Inc. |
| PTCI | Progressive Telecommunications |
| PTEC | Phoenix Technologies, LTD. |