| Acronym | Definition |
|---|
| SDR | Software Defined Radio (interoperable cellular technology) |
| SDR | Sales Development Representative (various companies) |
| SDR | Special Drawing Rights (of the International Monetary Fund) |
| SDR | State Department of Rehabilitation (various locations) |
| SDR | Standard Dynamic Range (video) |
| SDR | Secret Decoder Ring |
| SDR | Single Data Rate (semiconductors/memory/RAM) |
| SDR | Sustainable Development Report (various companies) |
| SDR | Sveriges Dövas Riksförbund (Swedish: Swedish Association of the Deaf) |
| SDR | Swap Data Repository (finance) |
| SDR | Sara Delano Roosevelt |
| SDR | Software Defined Radar |
| SDR | Sensor Data Records |
| SDR | Software Drivers |
| SDR | Storage Descriptor Register |
| SDR | Single Data Rate |
| SDR | Software Defined Radio |
| SDR | Synchronous Dynamic Ram |
| SDR | Special Drawing Rights |
| SDR | Session Director |
| SDR | Strategic Defence Review (British government report) |
| SDR | Standard Dimension Ratio (pipe specification; ratio of diameter to wall thickness) |
| SDR | Süddeutscher Rundfunk (now defunct Southern German Radio Station; merged with SWF to SWR) |
| SDR | System Design Review |
| SDR | Student Disciplinary Regulations (conduct code; various schools) |
| SDR | Selective Dorsal Rhizotomy |
| SDR | Supply Discrepancy Report |
| SDR | System Definition Review |
| SDR | Scalable Data Reduction (various companies) |
| SDR | Session Directory |
| SDR | Speaker Dependent Recognition (speech recognition) |
| SDR | Service Difficulty Report |
| SDR | Sensor Data Record |
| SDR | Satellite Digital Radio (ETSI standard) |
| SDR | Spoken Document Retrieval |
| SDR | Sony Dream Robot |
| SDR | Sediment Delivery Ratio |
| SDR | System Design Responsibility |
| SDR | Super Desperation Radio (Internet radio) |
| SDR | Société de Développement Régional (French: regional development company) |
| SDR | Secretaría de Desarrollo Rural (Spanish: Ministry of Rural Development; Mexico) |
| SDR | Subcommittee on Disaster Reduction (MCEER) |
| SDR | Space Division Regulation (US Air Force) |
| SDR | Software Design Review |
| SDR | Streaming Data Request |
| SDR | Stop Drop and Roll |
| SDR | Signal-to-Distortion Ratio |
| SDR | Sum Difference Ratio (imaging) |
| SDR | Standard Data Release (Long-Term Pavement Performance) |
| SDR | Short Direct Repeat |
| SDR | System of Distinct Representatives |
| SDR | Santander, Spain - Santander (Airport Code) |
| SDR | Standardized Death Rate (cancer) |
| SDR | Standard Drawing Rights |
| SDR | Standard Direct Receiver |
| SDR | Sustainable Design Resources (California) |
| SDR | State-Dependent Routing |
| SDR | Service Desk Request (computer support; various organizations) |
| SDR | Service Delivery Router (Zeugma) |
| SDR | Supplier Deviation Request (various companies) |
| SDR | Supplier Document Requirement |
| SDR | System Development Requirement |
| SDR | Standard Diameter Ratio (pipe) |
| SDR | Special Dietary Requirement (nutrition) |
| SDR | Spec Deviation Request (construction) |
| SDR | Sign-Difference Ratio |
| SDR | Software Discrepancy Report |
| SDR | System Deviation Report (inspections) |
| SDR | System Dynamic Range |
| SDR | Statistical Data Recorder |
| SDR | Storage Data Register |
| SDR | Student Dining Room (Moody Bible Institute) |
| SDR | Surveillance Detection Route |
| SDR | Strategic Data Retention (document management; Atlanta, GA) |
| SDR | Session Detail Record |
| SDR | Surrogate Digital Radio |
| SDR | Subeconomic Demonstrated Resources (Australian mining) |
| SDR | Surveillance Detection Run |
| SDR | Supply Demand Review |
| SDR | Splash Detection Radar |
| SDR | Small Development Requirement |
| SDR | Software Development Review (Microsoft) |
| SDR | Sex, Drugs, and Rock and Roll |
| SDR | Subsystem Design Review |
| SDR | Sequence Determined Redundancy |
| SDR | Single Design Review |
| SDR | Systolic Diastolic Ratio |
| SDR | Source Directed Requirement |
| SDR | Software Development Request |
| SDR | Schedule Delete Request |
| SDR | Software Deficiency Report |
| SDR | Subsystem Design Requirement |
| SDR | Signal Data Recorder |
| SDR | Systems Data Resources (University of Texas Health Science Center at Houston) |
| SDR | Spatial Data Repository |
| SDR | Service Defect Rate |
| SDR | Shared Data Repository (data warehousing concept) |
| SDR | Surrogate Data Radio |
| SDR | Service Driven Routing |
| SDR | Staged Data Repository |
| SDR | Shipping Destination Room |
| SDR | Sample Discrepancy Report |
| SDR | Standard Distribution of Resistance |
| SDR | Strange Dave Rosenberg (Long Island, New York band) |
| SDR | State Department Request |
| SDR | Super Data Rate |
| SDR | Sonar Data Recorder |
| SDR | Surface Duct Receiver |
| SDR | Same Day Resolution |
| SDR | Subcontractor Disposition Request |
| SDR | Surveillance, Data Recording and Reprographics (Kodak) |
| SDR | Stress/Design Report |
| SDR | Single Donation Record (records kept with each volunteer blood donation) |
| SDR | Supplemental Definition of Requirement |
| SDR | Signal Data Reproducer |
| SDR | Service Discrepancy Report (replaced Report of Deficiency, ROD) |
| SDR | Spatial Diversity Receiver |
| SDR | Slam Dunk Records (Lusaka, Zambia) |