Ios or IOS may refer to:

• Ios Island, an island in the Cyclades group in the Aegean Sea
• IOS Press, a Dutch publisher of scientific and medical research titles
• Internet operating system, software containing sets of procedures and functions providing the framework for the high-level implementation and operation of Internet based applications in a uniform manner
• Cisco IOS (originally Internetwork Operating System), the operating system used on Cisco Systems routers and some network switches
• The Investors Overseas Service, an investment company
• The Independent on Sunday, a UK newspaper
• ios (C++), a C++ header file
• Integrated Operating Solutions, a Miami based document management and EMR company
• Interorbital Systems, a private aerospace design firm located in Mojave, California
• International Online Soccer, a sports mod for Half-Life.
• Input/Output Subsystem, a component of the MVS element of z/OS (f/k/a OS/390) that provides the low level input and output interfaces for the operating system.
• Isles of Scilly, the group of islands off of Cornwall, UK
• Impulse oscillometry - technique to assess airflow obstruction in patients who are not able to perform forced breathing maneuvers, e.g., subjects with diaphramatic rupture, cerebral palsy or severe mental retardation, and young children.
• International Operator Services - Operator-Services Collect or credit card calling using a live operator to connect calls from anywhere to anywhere using a credit card or reverse charges to pay for it.

{QUPA '09}

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