IG
IG, Ig, or ig may refer to:
Biomedical or technology
Immunoglobulin, also known as antibody, a protein used by the immune system to identify and neutralize foreign objects such as bacteria and viruses
Imperial gallon (ig), an Imperial unit of volume defined as 4.54609 litres (1.20095 US gal)
Insulated glazing, double or triple glass window panes separated by an air or other gas-filled space to reduce heat transfer
Integrated graphics, the term for a graphics processor that is integrated into the mainboard
Companies
IG Farben, a former German industrial conglomerate
IG Group, a UK speculative investment company
IG Recordings, a record label formed by the Indigo Girls, an American folk/rock duo
Impressions Games, a defunct United States gaming company
Internet Group, stylized as "iG", a Brazilian internet service provider
Production I.G, a Japanese anime company
Meridiana S.p.A., an Italian airline, by IATA airline designator "IG"
Games
Imperial Guard (Warhammer 40,000), from the tabletop strategy game Warhammer 40,000
