ARF

• Advertising Research Foundation
• Animal Rescue Foundation
• Armenian Revolutionary Federation
• ASEAN Regional Forum

• Cahit Arf (1910–1997), Turkish mathematician

• Acute renal failure
• Acute rheumatic fever
• ADP ribosylation factor, a small GTP-binding protein
• The Arf invariant in mathematics
• Argon fluoride laser or ArF laser
• Atomic Resonance Filter or atomic line filter
• Auxin Response Factors in plants
• p14arf or ARF tumor suppressor

• Arf (Nanoha), character in Magical Girl Lyrical Nanoha
• Abuse Reporting Format
• Almost-Ready-to-Fly model aircraft
• The Azkena Rock Festival, Vitoria-Gasteiz, Spain

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