IG, Ig, or ig may refer to:

Companies

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Games

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Government

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Places

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Science and technology

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  • 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

Other uses

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