| ID | Name | # of EDID |
| PIO | Pioneer Electronic Corporation | 11 |
| PLY | Polycom Inc. | 2 |
| PNP | Microsoft | 1 |
| PNR | Planar Systems, Inc. | 19 |
| PTS | Plain Tree Systems Inc | 2 |
| PVR | Pimax Tech. CO., LTD | 2 |
| QDI | Quantum Data Incorporated | 15 |
| QDS | Quanta Display Inc. | 1 |
| RAT | Rent-A-Tech | 1 |
| REN | Renesas Technology Corp. | 1 |
| RGB | RGB Spectrum | 2 |
| RPI | RoomPro Technologies | 1 |
| RTI | Rancho Tech Inc | 1 |
| RTK | DO NOT USE - RTK | 26 |
| SAM | Samsung Electric Company | 340 |
| SAN | Sanyo Electric Co.,Ltd. | 4 |
| SCE | Sun Corporation | 5 |
| SEC | Seiko Epson Corporation | 30 |
| SEN | Sencore | 1 |
| SET | SendTek Corporation | 1 |