| | DAK | | Dead At Keyboard |
| | DAM | | Divorced Asian Male |
| | DAMHIK | | Don't ask me how I know |
| | DAoC | | Dark Age of Camelot |
| | dapo | | do all possible |
| | darfc | | ducking and running for cover |
| | DARPA | | Defence Advanced Research Projects Agency |
| | DARPA | | Defense Advanced Research Projects Agency |
| | das | | Direct Attached Storage |
| | DATB | | Direct Access Test Bus |
| | dato | | data |
| | dato | | date |
| | dato | | datum |
| | dato | | Dining at the O |
| | DATY | | dine at the Y |
| | DATY | | dining at the y |
| | DATYTC | | dining at the y till completion |
| | DAU | | Dümmster Anzunehmender |
| | DAYWBDB | | Do as you would be done by |
| | dba | | DataBase Administrator |
| | dba | | Date Book Archive |
| | dba | | decibel A-weighted |
| | dba | | DeciBel Adjusted |
| | dba | | Doctorate of Business |
| | dba | | Doing Business As |
| | dbaa | | don't be an ass |
| | DBAI | | Designed By An Idiot |
| | DBAs | | database administrators |
| | DBAU | | doing business as usual |
| | DBCS | | Double Byte Character Set |
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