iOS is a mobile operating system developed by Apple Inc. IOS or ios may also refer to: Technology Instructor operating station, in flight simulators International operator services, making an international call via a live telephone operator Computing Cisco IOS, router and switch operating system Cisco IOS XE Cisco IOS XR ios (C++), a C++ header file ("input/output stream") I/O System (86-DOS), DOS BIOS in 86-DOS I/O System (MS-DOS), DOS BIOS in MS-DOS Input/Output Supervisor, a part of the control program in the IBM mainframe OS/360 operating system and its successors IOS (Wii firmware), firmware that runs on the Nintendo Wii used with Wii homebrew Internet operating system, any operating system designed to run all of its applications and services through an Internet client, generally a web browser Interorganizational system, a system between organization iOS, the operating system by Apple Inc for the iPhone and other mobile hardware Organizations Illinois Ornithological Society, American state-based bird club Institute for Objectivist Studies, the former name of The Atlas Society Institute of Oriental Studies of the Russian Academy of Sciences International Organizations for Succulent Plant Research, in Zürich, Switzerland Interorbital Systems, an aerospace design firm in Mojave, California, US Investors Overseas Service, an investment company Places Ios, a Greek island Ilhéus Jorge Amado Airport (IATA airport code), Ilhéus, Brazil Media IOS Press, a Dutch scientific and medical publisher Independent on Sunday, a UK newspaper Ireland on Sunday, an Irish newspaper published from 1996 to 2006 Other uses International Open Series, an amateur snooker tour See also eyeOS I/O System (disambiguation) IO (disambiguation) Input/Output Control System (IOCS) BIOS (disambiguation) XIOS, Extended Input/Output System