CTB may refer to:
Companies and organizations
CTB/McGraw-Hill, a division of the McGraw-Hill Companies California Testing Bureau, a division of the McGraw-Hill Companies Canadian Tire Bank, the retail deposit-taking and credit card-issuing arm of Canadian Tire Corporation, Limited Ceylon Transport Board, the nationalised passenger transport venture in Sri Lanka Christchurch Transport Board, a defunct municipal public transport operator in Christchurch, New Zealand Citybus (Hong Kong), a public bus operator in Hong Kong Cooper Tire & Rubber Company's NYSE ticker symbol CTB International
Science and technology
Cement-treated Base, a specific type of soil cement, used as a base Cholera toxin B, a subunit of cholera toxin used for retrograde tracing Coding tree block, a processing unit of the High Efficiency Video Coding (HEVC) video standard CT (computer tomography) scan of the brain .ctb, Color-dependent Plot Style Table, a file extension used by AutoCAD
Places
City of Thunder Bay, a Canadian town in Ontario Commonwealth of The Bahamas Crabtree Technology Building, a Brigham Young University building Cut Bank Municipal Airport, an airport near Cut Bank, Montana, U.S., by IATA code Castletownbere or Castletown Berehaven, an Irish town in Co Cork.
Other uses Catch the Beat, an alternative game mode in Dean "peppy" Herbert's osu! rhythm game Comprehensive Test Ban, the goal of the Comprehensive Test Ban Treaty Crash Thunder Buster, a finishing move of Jyushin Thunder Liger Ryan Giggs or CTB, the claimant in CTB v News Group Newspapers and CTB v. Twitter Inc., Persons Unknown