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IG, Ig, or ig may refer to:

Biomedical or technology[edit]

  • 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


  • 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"




Other uses[edit]