| ISCO | Idaho Society of Clinical Oncology 
| Others |
| ISCO | In Situ Chemical Oxidation
| Others |
| ISCO | In-Situ Chemical Oxidation
| Others |
| ISCO | Index for Selective Carbon Oxidation
| Others |
| ISCO | Indian Students Cultural Organisation
| Others |
| ISCO | Indicated Specific Carbon Monoxide Emissions
| Others |
| ISCO | Industry Smart Card Object
| Others |
| ISCO | Information Sharing Customer Outreach
| Others |
| ISCO | Information System for Clinical Organisations
| Others |
| ISCO | Innermost Stable Circular Orbit
| Others |
| ISCO | International Society for Cellular Oncology
| Others |
| ISCO | International Soil Conservation Organization
| Others |
| ISCO | International Spill Control Organization
| Others |
| ISCO | International Standard Classification of Occupations
| Others |
| ISCO | International Symposium on Combinatorial Optimization
| Others |
| ISCO | Iranian Student Cultural Organization
| Others |