Acronyms
- Bank Account Debits Tax, an Australian tax
- Barksdale Air Force Base (IATA airport code: BAD) in Bossier City, Louisiana, United States
- B.A.D, Taiwanese boy band
- Bcl-2-associated death promoter, a pro-apoptotic protein
- Bookworm Adventures Deluxe, a word-forming game by PopCap Games, released in 2006
- Bipolar Affective Disorder, disregulatory mood disorder
- BAD-2, a Soviet armored trolley car
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