UB may refer to:
Ubuntu (/ʊˈbuːntʊ/ uu-BOON-tuu, stylized as ubuntu) is a Debian-based Linux operating system for personal computers, tablets and smartphones, where Ubuntu Touch edition is used; and also runs network servers, usually with the Ubuntu Server edition, either on physical or virtual servers (such as on mainframes) or with containers, that is with enterprise-class features; runs on the most popular architectures, including server-class ARM-based.
Uber Technologies Inc. is a transportation network company headquartered in San Francisco, California, United States, operating in 528 cities worldwide.
Ubuntu releases are made semiannually by Canonical Ltd, the developers of the Ubuntu operating system, using the year and month of the release as a version number.
UBS AG is a Swiss global financial services company, incorporated in the Canton of Zurich, and co-headquartered in Zürich and Basel.
Ubiquitin is a small (8.5 kDa) regulatory protein that has been found in almost all tissues (ubiquitously) of eukaryotic organisms.
Ubisoft Entertainment SA (formerly Ubi Soft Entertainment Software until 2003, commonly referred to as Ubisoft) is a French multinational video game publisher, headquartered in Rennes, France.
Uber Technologies Inc, is an American international technology company and transportation network company (TNC) with subsidiaries in many countries.
UB40 are an English reggae and pop band, formed in December 1978 in Birmingham. The band has had more than 50 singles in the UK Singles Chart, and has also achieved considerable international success.
Ubba, also known as Hubba, Ubbe, and Ubbi, was a mid-ninth-century Viking chieftain and one of the commanders of the Great Army, a coalition of Norse warriors that in AD 865 invaded the Anglo-Saxon kingdoms of Northumbria, Mercia, East Anglia and Wessex.