| Acronym | Meaning |
| DCIM/DSCIM | Display SYstem Computer Input Multiplexer |
| DCIU | Digital Control And Interface Unit |
| DCKNG | Docking |
| DCL | Document Change List |
| DCM | DECOM ControlMemory |
| DCM | Direction Cosine Matrix |
| DCM | Display And Control Module |
| DCM | Display And Control Module |
| DCMB | Development Configuration Management Board |
| DCN | Design Change Notice |
| DCN | Document Change Notice |
| DCN | Drawing Change Notice |
| DCNP | Document Change Notice Proposal |
| DCO | Detailed Checkout |
| DCOP | Displays |
| DCOP | Detailed Checkout Procedures |
| DCP | Data Collection Platform |
| DCP | Depot Condemnation Percent |
| DCP | DEU Control Program |
| DCP | Development Cost Plan |
| DCPEI | DEU Control Program End Item |
| DCR | Design Certification Review |
| DCR | Design Change Request |
| DCR | Design Concern Report |
| DCR | Document Change Record (or Review) |
| DCS | Data Communication System |
| DCS | Data Control System |
| DCS | Design Communication System |
| DCS | Design Criteria Specification |
| DCS | Detail Checkout Specification(s) |
| DCS | Digital Command System (Subsystem) |
| DCS | Display And Control System |
| DCS | Document Control System |
| DCS | Dual Checkout Station |
| DCSI | Data And Cqntrol Signal Interface |
| DCSP | Digital Control Signal Processor |
| DCSU | Digital Computer Switching Unit |
| DCU | Digital Computer Unit |
| DCU | Display And Control Unit |
| DCV | Direct Current Volts |
| DD | Data Depository |
| DD | Data Display |
| DD | Decoder Driver |
| DD | Dedicated Displays |
| DD | Directives Documentation |
| DD | Mechanical And Facilities Engineering (KSC DE Dir.) |
| DD&CS | Dedicated Display And Control Subsystem |
| DD/HH:MM:SS | Day/Hour:Minute:Second |
| DDA | Digital Differential Analyzer |
| DDA | ICD Departure Authorization |