Other Uses
- Ub Iwerks (1901–1971), American animator and cartoonist
- U-B; service name for HMS Seal (N37)
- Ubiquitin, a small regulatory protein
- U.B. Funkeys, a computer game for children
- Ugly Betty, an American dramedy series which sometimes uses the abbreviation
- Universal Beam, a type of I-beam
- Upward Bound, a United States Department of Education-sponsored program
- The Urantia Book, a spiritual and philosophical book published in 1955
- German submarine U-B, the German name for the captured British submarine HMS Seal (N37)
- Berezin UB, Soviet World War II machine gun
- Undefined behavior, term used in computer science for operations that are unspecified
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