| Acronym | Definition |
|---|
| ID | Idaho (US postal abbreviation) |
| ID | Inside Diameter |
| ID | Inside Dimension |
| ID | Identification/Identity/Identifier |
| ID | I'm Down (Beatles song) |
| ID | Information Development |
| ID | International Development |
| ID | Information Document |
| ID | Interface Device |
| ID | Initial D (Japanese Anime) |
| ID | Identification Data |
| ID | Indonesia (Including Portuguese Timor) |
| ID | Internal Document |
| ID | Industrial Design |
| ID | Installation Data |
| ID | Integrated Design |
| ID | Interior Design |
| ID | Inner Diameter |
| ID | Intelligent Design (theology) |
| ID | Inclusive Design (design for all) |
| ID | Indoor |
| ID | Internal Diameter |
| ID | Institution Directory (FDIC) |
| ID | Intellectual Disability |
| ID | Instructional Design |
| ID | Inch Down (elevators) |
| ID | Insertion Device |
| ID | Infantry Division |
| ID | Infectious Disease |
| ID | Implant Dentistry (journal) |
| ID | Integrated Diagnostics |
| ID | Indefinite Delivery |
| ID | Drain Current |
| ID | Initial Distribution |
| ID | Interior Decorator |
| ID | Idem (Latin: the same) |
| ID | Ides (Latin: Ides, their reckoning of the middle day of the month) |
| ID | Independent Democrats (South Africa) |
| ID | Intelligence Department |
| ID | Icewind Dale (game) |
| ID | Industry Discount |
| ID | Induced Draft (thermal power) |
| ID | Idaho Operations Office |
| ID | Investigación y Desarrollo (Spanish: Research & Development) |
| ID | Im Durchschnitt (German: on average) |
| ID | Im Dienst (German: on duty) |
| ID | Incremental Development |
| ID | International Dateline |
| ID | Industrial Dispute |
| ID | Instruction Decode (Von Neumann cycle step) |
| ID | Inter Dimensional |
| ID | Izquierda Democrática (Democratic Left, Ecuador) |
| ID | Interleaving Depth |
| ID | Infective Dose |
| ID | Intermediate Dose (treatment) |
| ID | Implementation Dependency |
| ID | Interconnecting Device |
| ID | Instrument Delivery |
| ID | Integrated Dictionary |
| ID | Interface Diagram |
| ID | Integrated Demonstration(s) |
| ID | Information Deficiency |
| ID | Individuated Dysautomania |
| ID | Interface Diagnostics |
| ID | Inertial Dampeners (Star Trek, Stargate Atlantis) |
| ID | Interpretative Documents |
| ID | Instantaneous Description (Turing Machine configuration) |
| ID | Irvine Dataflow |
| ID | Institut Dayakologi (Indonesian: Dayakologi Institute) |
| ID | Index Diagram |
| ID | Iditol Dehydrogenase |
| ID | Inside Dose (radiation exposure) |
| Id | Inhibitors of DNA Binding/Differentiation |
| ID | Increased Deployability |
| ID | Integrated Daemon |
| ID | Instituto Desert (Brasil) |
| ID | Incapacitation Dose |
| ID | Intercommunication Device |
| ID | Intrinsic Densitometry |
| ID | Inventory Discrepancy |
| ID | Intrusion Detection |
| ID | International Diplomacy |
| ID | International Director |
| ID | Inventory Difference |
| ID | Issue Date |
| ID | Iraqi Dinar (unit of currency) |
| ID | We're in Demand (an old Id Software's slogan) |
| ID | Irrigation Department (Myanmar) |
| ID | Invariant Density |
| ID | Item Designator |
| ID | Intradermal |
| ID | Invisible Disability |
| ID | Intestinal Distress |