• DAP Products, Inc., an American manufacturer of caulking materials.
• DAP Technologies, a division of Roper Industries.
• DAP (software), a statistical analysis program.
• Dap greeting, a form of greeting in which two people slap and grasp hands briefly; also called a 'fist bump'
• Democratic Action Party, a Malaysian opposition political party
• Diammonium phosphate, used as a fertilizer and flame retardant
• Digital audio player, a electronic device that supports the playback of stored digital audio
• Directory Access Protocol, an implementation of the OSI model application layer
• Distributed Array Processor, the first commercial massively parallel computer
• Distributed Art Publishers
• Download Accelerator Plus, an application created to speed downloads
• Draw-A-Person Test, a psychological test to examine children's cognitive or emotional status
• Durham Athletic Park, a former minor league baseball park in Durham, North Carolina
• Aerovias DAP, an airline based in Punta Arenas, Chile
• DAP Helicopteros, a Chilean helicopter operator
• Dienst für Analyse und Prävention, Swiss internal security service
• German Workers' Party (Deutsche Arbeiterpartei)
• German Workers' Party (Austria-Hungary) (Deutsche Arbeiterpartei)
• Double Anal Penetration, a term used in the pornography industry.

Dap or DAP may also be used for:

• Daps or Plimsoll shoe
• Dapping or sinking, a metalworking technique
• Direct-Action Penetrator, an armed version of the UH-60 Black Hawk helicopter