| MS-DOS | Microsoft Disk Operating System |
|---|---|
| NVD | nausea, vomiting, and diarrhea; neck vein distention; neovascularization of the disk; neurovesicle d... |
| PID | pain intensity difference [score]; pelvic inflammatory disease; photoionization detector; picture im... |
| PIVD | protruded intervertebral disk |
| RD | radial deviation; radiology department; rate difference; Raynaud disease; reaction of degeneration; ... |