| AOR | Alvarado Orthopedic Research [instruments]; auditory oculogyric reflex |
|---|---|
| APRL | American Prosthetic Research Laboratory |
| ARCI | Addiction Research Center Inventory |
| ARF | acute renal failure; acute respiratory failure; acute rheumatic fever; Addiction Research Foundation... |
| ARL | Association of Research Libraries; average remaining lifetime |
| R&D | Research and Development |
|---|---|
| VDRL | Veneral Disease Research Laboratory |