| Acronym | Definition |
|---|
| RED | Retired, Extremely Dangerous (movie) |
| RED | Redundant |
| RED | Regional Economic Development (USACE) |
| RED | Requirements Document |
| RED | Research and Evaluation Division |
| RED | Random Early Detection (TCP/IP) |
| RED | Read Every Day |
| RED | Resource Discovery (International Workshop) |
| RED | Rear-Engine Dragster |
| RED | Reregistration Eligibility Decision Document |
| RED | Record of Emergency Data |
| RED | Regional Economic Development Partnership (Ohio Valley, WV, USA) |
| RED | Random Early Discard |
| RED | Reference Entity Database (Credit Derivative Swaps database) |
| RED | Rapid Extraction Desk |
| RED | Atlantic Redfishes |
| RED | Rover Equipment Deck (NASA) |
| RED | Reflection Electron Diffraction |
| RED | Redwood Empire Division (Northern California Demolay Association; International Order of DeMolay) |
| RED | Reactor Engineering Department |
| RED | Rebel Elite Defense (gaming) |
| RED | Review of Externalities Data (EU project) |
| RED | RCRA Enforcement Division (US EPA) |
| RED | Reliable Excavation Demolition (gaming, Team Fortress 2) |
| RED | Refunding Escrow Deposit |
| RED | Rapid Extraction Device |
| RED | Rapid Excess Disposal |
| RED | Registration of Estimated Deficiency |
| RED | Regional Emergency Dispatching |
| RED | Rest, Elevation, Direct pressure (bleeding control model for first aid instruction) |
| RED | Register of Employees Dismissed (Banking Council of South Africa) |
| RED | Renewable Energy Development (various organizations) |
| RED | Research and Economic Development (various organizations) |
| RED | Real Estate Directory (various locations) |
| RED | Real Estate Division (various organizations) |
| RED | Renewable Energy Directive (EU) |
| RED | Real Estate Database (resource) |