Other
- Abort, Retry, Fail?, part of an MS-DOS error message
- Abuse Reporting Format
- Advance recycling fee, such as California's Electronic Waste Recycling Fee
- Almost-Ready-to-Fly model aircraft
- Arf, the name of a robot in SpongeBob SquarePants: Battle for Bikini Bottom
- Arf arf is an onomatopoeia imitating a dog barking
- Australian rules football
- Advanced Recon Force (Star Wars)
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