| UNFPA | United Nations Population Fund |
|---|---|
| ICD | I-cell disease; immune complex disease; implantable cardioverter defibrillator; impulse-control diso... |
| IPA | immunoperoxidase assay; incontinentia pigmenti achromians; independent physician or practice associa... |
| SI | System of International Units (Systeme International D'unites) |
| BIPM | International Bureau of Weights and Measures [Fr. Bureau International des Poids et Mesures] |
| ICSD | International Classification of Sleep Disorders |
|---|---|
| ICRU | International Commission of Radiation Units and Measurements |
| ICRP | International Commission of Radiological Protection |
| ICSH | International Committee for Standardisation in Haematology |
| ICRC | International Committee of the Red Cross |