| IDSA | Infectious Disease Society of America |
|---|---|
| ISA | Instrument Society of America; intracarotid sodium amytal; intrinsic simulating activity; intrinsic ... |
| NSA | Neurological Society of America; normal serum albumin; no salt added; no significant abnormality; no... |
| OSA | obstructive sleep apnea; Office of Services to the Aging; Optical Society of America; ovarian sectio... |
| RESNA | Rehabilitation Engineering Society of North America |