| Inlet Control Device | Academic & Science |
| Indian Creek Designs | Business |
| Industrial Clothing Division | Business |
| Insurance Claims Denial | Business |
| Internal Control Department | Business |
| Information & Control Department | Business |
| Inland Customs Deport | Business |
| Institute for Career Development | Business |
| Isocitric Dehydrogenase | Chemistry |
| Intelligence Community Directive | Community |
| Information And Communication For Development | Community |
| International Code Designator | Computer and Networking |
| Interactive Compact Disc | Computing |
| International Coding Diagnosis | Computing |
| Intel Core Duo | Computing |
| Internet Connected Device | Computing |
| Integrated Cyber Defense | Computing |
| International Contracts Database | Computing |
| IC DEFI | Cryptocurrency |
| International College of Dentists | Educational Institute |
| Inter Compressor Duct | General |
| Interface Control Documentation | General |
| I Can Develop | General |
| Internal Container Depot | General |
| Italian Car Day | General |
| Ignition Coil Driver | General |
| Ignition Control Driver | General |
| Integrated Coil Driver | General |
| Integrated Chassis Design | General |
| Intelligent Colour Display | General |
| In Car Display | General |
| In Car Delivery | General |
| Instrument Cluster Diagnostics | General |
| Inland Container Depot | General |
| In Circuit Debugger | General |
| Imitating Christ Daily | General |
| If Concerned Don | General |
| Infernal Crushing Doomhallow | General |
| Isomthing Client Driver | General |
| Institutional Cash Distributors | General |
| Implantable Cardioverter Defibrillators | General |
| Inland Container Depots | General |
| Interactive Call Distribution | General |
| Independence Contract Drilling | General |
| Inner Circle Distribution | General |
| Investment Corporation of Dubai | Governmental |
| Initial Capabilities Document | Governmental |
| Inland Clearance Depot | Governmental |
| Informed Consent Document | Governmental |
| Institute for Child Development | Governmental |
| Institute for Child | Governmental |
| Institute for Challenging Disorganization | Governmental |
| Institute for Cultural Diplomacy | Governmental |
| Institute for Computational Design | Governmental |
| International Classification of Diseases | Healthcare |
| International Consultants of Delaware | International |
| I Can't Decide | Internet |
| I Cant Deal | Internet |
| Irritant contact dermatitis | Medical |
| Impulse Control Disorder | Medical |
| International Classification of Diseases (coding system) | Medical |
| Implanted cardiac defibrillator | Medical |
| Internal Cardioverter Defibrillator | Medical |
| Implantable Cardiac Defibrillator | Medical |
| I cell disease | Medical |
| Immune Complex Disease | Medical |
| Induced Circular Dichroism | Medical |
| InterCalated Duct | Medical |
| International Classification of Disease | Medical |
| Ischaemic Coronary Disease | Medical |
| Implantable Cardioverter Defibrillator | Medical Instruments |
| Information & Control Department | Messaging |
| Initiative Communications Deception | Military and Defence |
| International Classifications of Diseases | Military and Defence |
| International Cooperation and Development Program | Military and Defence |
| Installable Client Driver | Networking |
| Integrated Contact Distribution | Softwares |
| Interface Control Document | Space Science |
| Interface Control Drawing | Space Science |