| ISI | infarct size index; initial slope index; injury severity index; Institute for Scientific Information... |
|---|---|
| ISM | information sources map [of UMLS]; International Society of Microbiologists; intersegmental muscle |
| ISR | information storage and retrieval; Institute for Sex Research; Institute of Surgical Research; insul... |
| IT | immunological test; immunotherapy; implantation test; individual therapy; information technology; in... |
| LISA | Library and Information Science Abstracts |