| Company Name | Software Titles |
|---|---|
| ProClarity | 7 |
| Persystent Software | 7 |
| Palm or its subsidiaries and their licensors | 8 |
| ParetoLogic | 8 |
| Python Software Foundation | 8 |
| Pictometry | 8 |
| Primavera | 8 |
| PC Camera | 8 |
| PACE Anti-Piracy | 8 |
| PC Tools | 9 |
| PopCap | 9 |
| PIXELA | 10 |
| Pervasive Software | 10 |
| Panda Security | 10 |
| Polar | 10 |
| Plantronics | 11 |
| Portrait Displays | 11 |
| PrepLogic | 11 |
| PKWARE | 13 |
| Pantech | 13 |
| Paessler AG | 15 |
| pythonxy.com | 15 |
| Pure Networks | 15 |
| Polycom | 15 |
| Parallels | 15 |
| Pitney Bowes | 17 |
| PFU | 21 |
| Promethean | 23 |
| Pinnacle Systems | 26 |
| Palm | 26 |
| ProfitStars | 36 |
| Pearson | 43 |
| Philips | 48 |
| Practitioners Publishing | 51 |
| PTC | 52 |
| Panasonic | 103 |