sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Is an Official Chapter | **** |
| Ieee Security Org Cipher | **** |
| In Situ Object Counting | *** |
| INTEGRAL Science Operations Centre | *** |
| International Series of Champions | *** |
| Industry in the Society | *** |
| Islamic Societies on Campus | *** |
| International School of Organometallic Chemistry | *** |
| Irish Society of Charlotte | *** |
| Idaho System of Care | *** |
| INTEGRAL Science Operation Centre | *** |
| Instrument Science Operations Center | *** |
| International Summer Organ Conservatoire | *** |
| Internet Society of Chile | ** |
| Internal Security Operation Command | ** |
| indoor standardized obstacle course | ** |
| In Situ Oxygen Curtain | ** |
| International Symposium On Circuits | ** |
| Information Security Operations Center | ** |
| Integrated Security Operations Center | ** |
| International School of Cosmetology | ** |
| Integral Science Operations Center | ** |
| International Scientific and Organizing Committee | ** |
| International Special Operations Command | ** |
| Immunity for Security Officials | ** |
| imperial special operations command | * |
| International Symposium On Communications | * |
| International Student Orientation Committee | * |
| Integrated Space Operations Center | * |
| imaging spectrometric observatory computer | * |
| ISDN Standard Ordering Codes | * |