- D2D stands for Device-to-Device (communications)
- D2D stands for Disk-To-Disk (backup technology/strategy)
- D2D stands for Digital-to-Digital (converter)
- D2D stands for Day to Day
- D2D stands for Data to Decision (program)
- D2D stands for Door to Door (sales)
- D2D stands for Design to Delivery (various organizations)
- D2D stands for Discovery to Delivery (various meanings)
- D2D stands for Dealer to Dealer
- D2D stands for Database to Database
- D2D stands for Department to Department
- D2D stands for Dust to Dawson (motorcycle ride)
- D2D stands for District-to-District (education)
D2D