Other
- Killer Activation Receptor
- kar, an Armenian word meaning "stone"
- Karair, formerly Karhumäki Airways (ICAO: KAR), a Finnish airline
- K.A. Rasmussen, a Norwegian precious metals company
- kar is a Kurdish word meaning "donkey"
- kar (Jyutping:Gaa1) means "family" in Cantonese
- kar is an Albanian slang for "penis"
- K.A.R. is an underground rap group founded by Fat Joe. It stands for Kill All Rats.
- KAR file format, same as MID. S.MID
- kar in Hindi/Gujarati/Punjabi/Indian language means do or do it
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