| Abbreviation | Definition |
|---|---|
| ISBR | Islamic Society of Bay Ridge |
| ISBS | International Society Baccalaureate Scholars |
| ISBS | International Society for Bioengineering and the Skin |
| ISBS | International Society of Baccalaureate Scholars |
| ISBS | International Stress and Behavior Society |
| ISBT | International Society Blood Transfusion |
| ISBT | International Society for Blood Transfusion |
| ISBT | International Society for Blood Transfusions |
| ISC | International Society for Criminology |
| ISC | International Society of Chemotherapy |
| ISC | International Society of Chemotherapy: Infection and Cancer |
| ISC | International Society of Cryptozoology |
| ISCA | International Society for Computers and Their Applications |
| ISCA | International Society for Conversation Analysis |
| ISCA | International Society of Caricature Artists |
| ISCA | International Society of Christian Apologetics |
| ISCAIP | International Society for Child and Adolescent Injury Prevention |
| ISCAIP | International Society of Children and Adolescent Injury Prevention |
| ISCAR | Illinois Society Children of the American Revolution |
| ISCAR | International Society for Cultural and Activity Research |