HB may refer to:
Home Box Office (HBO) is an American premium cable and satellite television network that is owned by Time Warner through its respective flagship company Home Box Office, Inc.
HBOS plc is a banking and insurance company in the United Kingdom, a wholly owned subsidiary of the Lloyds Banking Group, having been taken over in January 2009. It is the holding company for Bank of Scotland plc, which operates the Bank of Scotland and Halifax brands in the UK, as well as HBOS Australia and HBOS Insurance & Investment Group Limited, the group's insurance division.
HBO (Home Box Office), which was originally established as a premium cable television channel in the United States, has expanded worldwide.
Beta globin (also referred to as HBB, β-globin, haemoglobin beta, hemoglobin beta, or preferably haemoglobin subunit beta) is a globin protein, which along with alpha globin (HBA), makes up the most common form of haemoglobin in adult humans, the HbA.
HBO Asia (formerly known as MovieVision, officially launched on 1 May 1992 and officially dissolved on 31 May 1995) is owned by HBO (a Time Warner company).
HBO Go is a TV Everywhere service offered by the American premium cable network HBO, owned by Time Warner subsidiary Home Box Office, Inc.
HBO Canada is a multiplex television channel of the Canadian premium cable and satellite television service The Movie Network (TMN), which is owned by Bell Media.
HBGary is a subsidiary company of ManTech International, focused on technology security. In the past, two distinct but affiliated firms had carried the HBGary name: HBGary Federal, which sold its products to the US Federal Government, and HBGary, Inc.