(computing, mobile telephony) A mobile operating system (OS) created and developed by Apple Inc. exclusively for its hardware.

plural of io

An island in the Cyclades, Greece.

plural of IO

(computing, electronics) Initialism of input and output. / (grammar) Initialism of indirect object. / Initialism of intelligence officer.

(emergency medicine) Abbreviation of intraosseous.

A type of moth, the io moth.

(rare) An exclamation of joy or triumph.

(Greek mythology) The daughter of Inachus river god, and a lover of Zeus, turned by the latter into a heifer.

(pharmacology) Used to form names of iodine-containing contrast media.