| D2D | Diploma to Degree 
| Others |
| D2D | Direct2Drive
| Others |
| D2D | Disk to Disk
| Others |
| D2D | Disk-to-Disk
| Others |
| D2D | Door to Door
| Others |
| D2D | Down 2 Die
| Others |
| D2D | Drive to Drive
| Others |
| D2D | Driver to Driver
| Others |
| D2D2T | Disk to Disk to Tape
| Others |
| D2DDC | Dare 2 Dance Dance Company
| Others |
| D2E | Distance to Empty
| Others |
| D2E | Driven to Excellence
| Others |
| D2E | Driven to Extremes
| Others |
| D2F | Desktop to Fax
| Others |
| D2G | Digital To Go
| Others |
| D2G | Direct to Garage
| Others |
| D2G | Distance to Go
| Others |
| D2G | Dust to Glory
| Others |
| D2I | Device to Infrastructure
| Others |
| D2I | Distance to Intersection
| Others |
| D2K | Datsun 2000
| Others |
| D2L | Desire to Learn
| Others |
| D2M | Dead To Me
| Others |
| D2MAC | Digital Multiplexed Analog Component Version Two
| Others |
| D2NS | Dual Dynamic Noise Suppresser
| Others |
| D2O | Deuterium Oxide (Heavy Water)
| Others |
| D2P | Driver to Passenger
| Others |
| D2R | dopamine D2 receptor
| Others |
| D2R | Driver to Roadside
| Others |
| D2T2 | Dye Diffusion Thermal Transfer
| Others |
| D2U | Direct to You
| Others |
| D2V | Device to Vehicle
| Others |
| D2V | Driver to Vehicle
| Others |
| D2V | Drone to Vehicle
| Others |
| D2V | Dvd to Avi
| Others |
| D2V | Dvi to Vga
| Others |
| D3 | Data Driven Documents
| Others |
| D3 | Decide, Detect, Deliver
| Others |
| D3 | Diablo 3
| Others |
| D3 | Digital channel bank, Third generation
| Others |
| D3 | Downloadable Dynamometer Database
| Others |
| D3 | Vitamin D3
| Others |
| D365UG | Dynamics 365 Users Group
| Others |
| D3A | Decide, Detect, Deliver, and Assess
| Others |
| D3D | Direct Three Dimensional
| Others |
| D3DRM | d3d Retained Mode
| Others |
| D3EA | Dual Dynamometer Differential Effectiveness Analysis
| Others |
| D4 | 4-Sided Dice
| Others |
| D4 | Digital channel bank, Fourth generation
| Others |
| D48 | Dundee Flying Club Airport, Dundee, New York USA
| Others |