| English | Bulgarian |
| 3-D column chart | 3-D колонна диаграма (A column chart subtype that compares data points along two axes) |
| 3-D effect | 3D ефект (A diagramming capability that shows charts in three dimensions) |
| D-channel | D-канал (A separate channel of an Integrated Services Digital Network (ISDN) line that is used for ISDN signaling. For ISDN Basic Rate Interface (BRI), the D-channel is 16 kilobits per second (Kbps). For ISDN Primary Rate Interface (PRI), the D-channel is 64 Kbps) |
| Windows Flip 3D A feature that allows users to use the scroll wheel on their mouse to flip through open windows in a stack, and quickly locate and select the one they want to work with | 3D прелистване (в Windows) |