| Acronym | Definition |
|---|
| ICR | Information Collection Request |
| ICR | Institute of Cancer Research (Canada) |
| ICR | Institute for Creation Research |
| ICR | Intelligent Character Recognition |
| ICR | International Communications Research |
| ICR | Ion Cyclotron Resonance (mass-spectrometry) |
| ICR | Institute of Clinical Research (Buckinghamshire, UK) |
| ICR | Information Collection Rule |
| ICR | Implementation Completion Report (World Bank) |
| ICR | Institute of Cetacean Research (Japan) |
| ICR | I Can't Remember |
| ICR | Indirect Cost Rate |
| ICR | Institute for Chemical Research (Kyoto University, Japan) |
| ICR | Interest Coverage Ratio |
| ICR | Imprinting Control Region (genetics) |
| ICR | Image-Character Recognition |
| ICR | Initial Cell Rate |
| ICR | Industrial Cases Reports (UK) |
| ICR | International Congress of Refrigeration |
| ICR | Investment Credit (IRS) |
| ICR | Intelligent Call Router |
| ICR | Inventory Change Report |
| ICR | Industrial Cost Recovery |
| ICR | In-Circuit Reconfigurable |
| ICR | In-Country Review |
| ICR | Incentivo Para la Capitalización Rural (Spanish) |
| ICR | Industrial Commercial Residential |
| ICR | Independent Cost Review |
| ICR | Initial Confirmation Review |
| ICR | Individual Census Report |
| ICR | Inter-Cooled Recuperated (gas turbine engine) |
| ICR | Incident Complaint Report (US Navy Police) |
| ICR | Instituut voor Criminaliteitsbeheersing en Recherchekunde (Institute for Criminal Investigation and Crime Science, Zutphen, Netherlands) |
| ICR | International Commerce Review (publication) |
| ICR | Institute for Cooperative Research |
| ICR | Intelligence Collection Requirement |
| ICR | Intercultural Resources (Indian organization) |
| ICR | Investigation Continuation Review |
| ICR | Interactive Color Raster Graphics (through TELNET, for example) |
| ICR | Interface Change Request |
| ICR | Integrated Cancellation Ratio |
| ICR | Integrating Contractor Representative |
| ICR | Inter-City Relay Station |
| ICR | Instrument Command Request |
| ICR | Incomplete Cyclic Reduction |
| ICR | Interexchange Carrier Representative |
| ICR | Injector Control Room |
| ICR | Interactive Compliance Research |
| ICR | International Centre of Roerichs (Moscow, Russian Federation) |
| ICR | Internationale Commissie ter Bescherming van de Rijn (Dutch: International Commission for the Protection of the Rhine against Pollution) |
| ICR | Interim Change Request |
| ICR | Internal Contact Report |
| ICR | Item Control Recommendation |
| ICR | Inertial Confinement Fusion Reactor |
| ICR | Intrasomal Corneal Ring (refractive vision correction) |
| ICR | Internet Core Routers |
| ICR | International Communications Recorder |
| ICR | Ioannis Casimir Rex (Polish King; 17th Century) and a play on words: Initium Calamitatis Regni (beginning of the countries mishap) |
| ICR | Insulated Conductor Rotation |
| ICR | Inconsistency Report (US Marines) |
| ICR | Interference Cancellation Ratio (signal processing) |