OBB

OBB may refer to:


 * ÖBB, Austrian Federal Railways
 * OBB (band), a Christian pop rock band
 * Oliver B. Bumble, comic series and name of its main character
 * Opaque binary blob, a file format, which is (among others) used by the Android operating system
 * Open Buy Back, a security
 * Oriented bounding box, a type of bounding volume used in computer geometry
 * OTC Bulletin Board, a regulated quotation service for stocks that are not listed on one of the major U.S. stock exchanges
 * Opening Billboard or title sequence