| ROS | reactive oxygen species; review of systems; rod outer segment |
|---|---|
| SMS | senior medical student; serial motor seizures; Shared Medical Systems; Smith-Magenis syndrome; somat... |
| SI | System of International Units (Systeme International D'unites) |
| BIPM | International Bureau of Weights and Measures [Fr. Bureau International des Poids et Mesures] |
| IAG | International Association of Gerontology; International Academy of Gnathology |
| ICIDH | International Classification of Impairments Disabilities and Handicaps |
|---|---|
| I.C.P.C. | International Classification of Primary Care |
| ICSD | International Classification of Sleep Disorders |
| ICRU | International Commission of Radiation Units and Measurements |
| ICRP | International Commission of Radiological Protection |