B2 or B-2 may refer to B2 · Vitamin B2 · B2, the IATA airline designator code for Belavia Belarusian Airlines. · B2, an international standard paper size defined in ISO 216 measuring 500 mm × 707 mm. · B2, one of a pair of bananas featured in the children's television show Bananas in Pyjamas · b2cafelog, the precursor to the WordPress blogging software · B2, a subclass of security level B as defined by Trusted Computer System Evaluation Criteria standards · B2, a code used by the land use planning system in the UK · B2 star, a subclass of bluish-white B-class stars · B2, the name of a character from the Dutch television series Bassie en Adriaan · HMS B2, one of eleven British B class submarines of the Royal Navy · Vulcan B2, a Royal Air Force V-Bomber aircraft. · B2 Networks