| | DBSS | | Don't Be So Stupid |
| | dbta | | date to be advised |
| | dbta | | Days to be agreed |
| | dbta | | dead by the third act |
| | DCB | | data control block |
| | DCC | | Direct Computer Connection |
| | DClinPsy | | Doctor of Clinical Psychology |
| | DCMAT | | Do Call Me Any Time |
| | DCMICY | | Don't Call Me, I'll Call You |
| | DCOM | | distributed component object model |
| | DCOSM | | Don't cry over spilt milk |
| | dcowbhh | | draw circle on wall bang head here |
| | DCUWCY | | Don't call us, we'll call you |
| | DCYCBTAH | | Don't count your chickens before they are hatched |
| | DCYCBTH | | Don't Count Your Chickens Before They're Hatched |
| | DDCD | | Double Density CD |
| | DDD | | Direct Distance Dial |
| | DDDK | | Device Driver Development Kit |
| | DDDWTT | | dead dogs don't wag thier tail |
| | DDF | | Drug and Disease Free |
| | DDG | | drop dead gorgeous |
| | DDL | | Data Definition Language |
| | DDL | | direct download |
| | ddos | | Distributed Denial of service |
| | DDR | | Dance Dance Revolution |
| | DDR | | Double Data Rate |
| | DDR | | Dual Data Rate |
| | ddr2 | | double-data-rate two |
| | DDS | | Digital Data Services |
| | DDS | | Digital Data Storage |
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