| OST | object sorting test; Office of Science and Technology |
|---|---|
| OTA | occupational therapy assistant; Office of Technology Assessment; ornithine transaminase; orthotoluid... |
| PCAST | President's Committee of Advisors on Science and Technology |
| PTSM | Plant, Technology and Safety Management |
| SLT | left sacrotransverse [fetal position] [Lat. sacrolaeva transversa]; single lung transplantation; smo... |