| Abbreviation | Definition |
|---|---|
| DDD | Division Of Developmental Disability |
| DDD | Direct Distance Dialing |
| DDD | Desired Delivery Date |
| DDDI | Density Dependent Delta Interaction |
| DDDI | Distance Diagnostic Digital Imaging |
| DDE | Dynamic Detail Enhancer |
| DDF | Data Distribution Facility |
| DDFM | Data Distribution Facility Manager |
| DDI | Discard Digits Instruction |
| DDI | Discrete Digital Input |
| DDI | Discrete Data input |
| DDI | Dedicated Display Indicator |
| DDIS | Data Depository Index System |
| DDK | Distinguished Double Cross |
| DDL | Data Definition Language |
| DDM | Data Display Module |
| DDM | Data Display Monitoring |
| DDM | Discrete Data Management |
| DDM | Difference in Depth of Modulation |
| DDMS | DOD Manager for Space Shuttle Support |
| DDN | Data Delivery Notice |
| DDO | Discrete Digital Output |
| DDO | Designated Detention Officer |
| DDOP | Developmentally Disabled Offenders Program |
| DDP | Design Development Plan |
| DDP | Digital Data Processing |
| DDPC | Digital Data Processing Center |
| DDPF | Dedicated Display Processing Function |
| DDPS | Digital Data Processing System |
| DDR | Daily Diary Report |
| DDR | Data Discrepancy Report |
| DDR | Design Development Record |
| DDR | Detail Design Review |
| DDS | Doctor Of Dental Surgery |
| DDS | Data Display System |
| DDS | Detailed Design Specification |
| DDS | Documentation Distribution System |
| DDS | Digital Data Service |
| DDSA | Deputy Director of School Administration |
| DDT | Dichloro Diphenyl Trichloroethane |
| DDT | Dichloro Diphenyl Trichloro-ethane |
| DDT | Dichloro Diphenyl Trichlorethane |
| DDT | Dichloro Diphenyl Trichloromethylmethane |
| DDTF | Dynamic Docking Test Facility |
| DDTS | Dynamic Docking Test System |
| DDU | Data Display Unit |
| DDU | Decommutator Distribution Unit |
| DDU | Display Driver Unit |
| DDU | Disability Determination Unit |
| DDU | District Detective Unit |