| IDA | International Dark-sky Association | - | Atmospheric Research Center |
| IDA | International Desalination Association | - | Computer Acronyms(common) |
| IDA | Isotope Dilution Analysis | - | Computer Acronyms(common) |
| IDA | Interdigitated Array (microelectrodes) | - | Computer Acronyms(common) |
| IDA | Iron Deficiency Anemia | - | Computer Acronyms(common) |
| IDA | Interface Display Assembly | - | Organizations |
| IDA | U.S. Institute For Defense Analyses - International Development Association (part Of The World Bank | - | Astronomy |
| IDA | Institute For Defense Analysis | - | Business and Finance |
