Io

Io, IO, iO, I/O, i/o, or i.o. may refer to:

Iowa ( (listen)) is a state in the Midwestern United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west.

iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware.

iOS is a mobile operating system, developed by Apple Inc. for iPhone, iPad, and iPod Touch. Updates for iOS are released through the iTunes software and, since iOS 5, via over-the-air software updates.

Ionizing radiation (ionising radiation) is radiation that carries sufficient energy to detach electrons from atoms or molecules, thereby ionizing them.

iOS jailbreaking is the privilege escalation of an Apple device for the purpose of removing software restrictions imposed by Apple on iOS, tvOS and watchOS operating systems.

Ion Television is an American free-to-air television network/syndication service that is owned by Ion Media.

Iowa State University of Science and Technology (Iowa State) is a flagship public land-grant and space-grant research university in Ames, Iowa.