• Big Audio Dynamite - British rock band founded by Mick Jones, formerly of punk pioneers The Clash.
• Broken as designed - A computer slang term originating at IBM, saying of a program that it is bogus because of bad design and misfeatures rather than because of defects in implementation. (Compare Defective by Design.)
• Banda language (ISO 639 alpha-3, bad)
• 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.

See also

• Bad