| Acronym | Meaning |
| PO-TDSE | Periodic Orbit-time Dependent Schroedinger Equation |
| PLOT | Porous Layer Open Tubular (capillary Column For Gas Chromatography) |
| ORD BBS | ORD Electronic Bulletin Board System |
| IGFBP | Insulin-like Growth Factor-binding Proteins |
| SEAWIFS | Sea Viewing Wide Field Of View Sensor |
| HRT | Hormone Replacement Therapy |
| CORMIX | Cornell Mixing Zone Model |
| DIN | Deutsche Industrie-Norm (German Industrial Standard) |
| KKRASA | Korringa-Kohn-Rostoker Atomic-sphere Approxn. (in Band Structure) |
| TLR | Toll-like Receptor |