IG

IG, Ig, or ig may mean:

Biology:
*Immunoglobulin

Places:
*Ig, a town and a municipality in Slovenia
*IG postcode area, a group of postcode districts around Ilford, England

Terms:
*Inspector General (civilian or military administration), a high ranking official charged with the mission to inspect and report on some bodies in his field of competency
*Igbo language, the official language of Nigeria (ISO 639 alpha-2, ig)
*Insulated glass

Companies:
*IG Farben, a German industrial conglomerate
*IG Group, a UK speculative investment company
*iG - internet Generation, a Brazilian internet service provider
*Production I.G, a famous Japanese anime company

Games:
*Imperial Guard, from the tabletop strategy game, Warhammer 40,000 Universe
*Imperium Galactica, a 1997 PC CD-ROM game by Hungary-based Digital Reality
*Insomniac Games, an online slang term used by members of its community
*Instagib, a mutator in various first person shooter games such as Unreal Tournament, Unreal Tournament 2003, and Unreal Tournament 2004

Other:
*Ig Nobel Prize, a parody of the Nobel Prize
*Inspector Gadget, a cartoon television show and movie
*Italian Greyhound, a breed of dog
*Islamic Group (Al-Gama'a al-Islamiyya), a militant Egyptian Islamist movement
*Inverse gamma distribution, a common continuous distribution in Statistics
*iGoogle, Google's personalized homepage
*Indigo Girls, a folk/rock duo from the United States
*Inscriptiones Graecae, a collection of ancient Greek sources
*Integrated Graphics, graphics processor is integrated into the mainboard