DAF Trucks, a Dutch truck and car manufacturing company

Deutsch-Amerikanische Freundschaft, an electropunk/NDW band from Düsseldorf

Dynamic amplification factor, a factor of increase of effect over a static load due a dynamic load in structural dynamics

Daf, a percussive instrument

Dwarf African frog or African dwarf frog

Desert Air Force, an RAF formation operating in North Africa during World War II

"D.A.F." (song), a song by Powderfinger

Dissolved air flotation (DAF), a water treatment process

Decay accelerating factor, a protein involved in the complement system

Deutsche Arbeitsfront or German Labour Front, the state-run amalgamated trade union organization of Nazi Germany

Daf Yomi, the daily regimen Talmud study in Judaism

défecteurs de l'armée française or Defectors from the French army to the ALN, a faction within the Algerian army

Delayed auditory feedback, a device used to delay a person's voice to their own ear, which reduces stuttering and cluttering

DAF Bus, a Netherlands-based bus builder now known as VDL Bus International

Directed attention fatigue, a neurological symptom characterized by the fatigue of the inhibitory attention system

Delivered At Frontier, an incoterm used when goods are transported by rail and road