| DIS | Diagnostic Interview Schedule; draft international standard |
|---|---|
| DSI | deep shock insulin; Depression Status Inventory; disulfide isomerase; Down Syndrome International |
| FDI | first dorsal interosseous [muscle]; International Dental Federation [Federation Dentaire Internation... |
| FEGO | International Federation of Gynecology and Obstetrics |
| FIC | Fogarty International Center; fractional inhibitory concentration |
| ISO | International Standard Organisation |
|---|---|
| ISAAC | International Study of Asthma and Allergies In Childhood |
| ISIS-2 | International Study of Infarct Survival |
| IUATLD | International Union Against Tuberculosis and Lung Disease |
| IUPAC | International Union of Pure and Applied Chemistry |