| Intergovernmental Oceanographic Commission | Academic & Science |
| Indian Ocean Climate | Academic & Science |
| Indirect Object Clitic | Academic & Science |
| International Orchid Committee | Academic & Science |
| Immediate or Cancel | Accounts and Finance |
| Insist On Cash | Accounts and Finance |
| International Order of Characters | Associations & Organizations |
| Innovation Ontario Corporation | Business |
| Independent Operating Company | Business |
| Integration, Organization, Cohesion | Business |
| Inter-Office Communication | Business |
| International Oil Company | Business |
| In-organic Contaminant | Chemistry |
| International Ornithological Committee | Community |
| International Outreach Church | Community |
| Inner Olympic Club | Community |
| International Olympic Committee's | Community |
| Imitation Of Christ | Community |
| Interim Orders Committee | Community |
| Independent Oversight Committee | Community |
| Indian Oil Corporation | Company Name |
| Input/output Comparator | Computer Hardware |
| Input/output Configuration | Computer Hardware |
| Indicator of Compromise | Computing |
| ISDN Ordering Code | Computing |
| Infrastructure Operating Center | Computing |
| Install Optional Components | Computing |
| Instant Organizational Chart | Computing |
| Input Output Control | Computing |
| Ibm Open Class Library | Computing |
| Integrated Optical Circuit | Computing |
| Intel Online Connect | Computing |
| Indicators Of Compromise | Computing |
| Internet Of Communications | Computing |
| Internet Of Cores | Computing |
| Internet Of Customers | Computing |
| Internet Of Campus | Computing |
| Internet Of Clean | Computing |
| Internet Of Computer | Computing |
| Internet Operations Center | Computing |
| Internet Of Content | Computing |
| I/O Coin | Cryptocurrency |
| Impedance of Circuit | Electronics |
| Instant Orgcharting! Organizational Chart | File Type |
| Integer Overflow Checker | General |
| Institut Obert de Catalunya | General |
| International Olympic | General |
| Iron Ore Co | General |
| International Outreach Center | General |
| itial Operational Capability | General |
| Interesting Olympic Campaign | General |
| Intelligent Orientation Control | General |
| Interesting Olympic Confederation | General |
| Invasion Of Chaos | General |
| Instead of Ordinary Coke | General |
| Intolerant Olympic Committee | General |
| itial Operating Capability | General |
| Ignore Olympic Casualties | General |
| Indication Of Compromise | General |
| Input Output Cluster | General |
| Instant Oil Change | General |
| Infiniti Owner's Club | General |
| Isuzu Offroad Club | General |
| Ibiza Owners Club | General |
| Internet Of Cars | General |
| Isetta Owners Club | General |
| Independent Outpatient Clinic | Governmental |
| International Olive Council | Governmental |
| International Olympic a Council | Governmental |
| Industry Overpowers Communism | Governmental |
| International Organized Crime | Governmental |
| Ignorant Oppressive And Corrupt | Governmental |
| Index Of Cooperation | Governmental |
| Inter-Organizational Council | Governmental |
| In-Organic Contaminants | Governmental |
| Instrument Of Commitment | Governmental |
| Incident Operations Center | Governmental |
| Interception Of Communication | Governmental |
| Institute Of Coding | Governmental |
| International Outdoor Club | International |
| International Open College | International |
| International Open Coed | International |
| Iteration On Coefficient | Maths |
| VA Independent Outpatient Clinic | Medical |
| Intraoperative Cholangiogram (with gallbladder surgery) | Medical |
| IntraOral Camera | Medical |
| International Olympic Committee | Military and Defence |
| Indoor Obstacle Course | Military and Defence |
| Industrial Operations Command | Military and Defence |
| Intelligence Operations Center | Military and Defence |
| Investigations Operations Center | Military and Defence |
| Infantry Officer Course | Military and Defence |
| Initiative On Cities | Regional |
| Indian Orthodox Church | Society & Culture |
| Inversion of Control | Softwares |
| Indirect Operating Costs | Space Science |
| Initial Operating Capability | Space Science |
| Initial Operational Capability | Space Science |
| Input/output Controller | Space Science |
| International Othello Competitors | Sports |
| Inter-office Channel | Telecommunication |
