| ISDA | Idaho State Dental Association 
| Others |
| ISDA | Idaho State Department of Agriculture
| Others |
| ISDA | Illinois School District Agency
| Others |
| ISDA | Illinois State Deans' Association
| Others |
| ISDA | Image Spatial Data Analysis
| Others |
| ISDA | Independence of Smith-Dominated Alternatives
| Others |
| ISDA | Independent Schools Debating Association
| Others |
| ISDA | Indiana State Department of Agriculture
| Others |
| ISDA | Intelligent Systems Design and Applications conference
| Others |
| ISDA | International Security Driver Association
| Others |
| ISDA | International Semiconductor Development Alliance
| Others |
| ISDA | International Sonoran Desert Alliance
| Others |
| ISDA | International Swap and Derivative Association
| Others |
| ISDA | International Swap Dealer Association
| Others |
| ISDA | International Swap Dealers Association
| Others |
| ISDA | International Swaps and Derivative Association
| Others |
| ISDA | International Swaps and Derivatives Association
| Others |
| ISDA | International Swaps Dealers Association
| Others |
| ISDA | International Systems Dealers Association
| Others |
| ISDA | Iowa State Dairy Association
| Others |
| ISDA | Irish Student Drama Association
| Others |
| ISDA | Irish Student Drama Awards
| Others |
| ISDA | Irregularly-Spaced Data Analysis
| Others |
| ISDA | Italian Sons and Daughters of America
| Others |