| ICSU | International Council of Scientific Unions |
|---|---|
| ISI | infarct size index; initial slope index; injury severity index; Institute for Scientific Information... |
| SAB | Scientific Advisory Board; serum albumin; significant asymptomatic bacteriuria; sinoatrial block; So... |
| Sc | scandium; scapula; science, scientific; screening |
| Sci | science, scientific |