| MS | I, II, III, IV medical student-first, second, third, and fourth year |
|---|---|
| NI-NXII | first to twelfth cranial nerves |
| P1, | P-one first parental generation |
| PI | first meiotic prophase; isoelectric point; pacing impulse; package insert; pancreatic insufficiency;... |
| S1-S5 | first to fifth sacral nerves |