I/O may refer to:

Computing Input/output, a system of communication for information processing systems I/O model, a model of computation IEC 60417 symbols for power delivery or device activation

Economics Input–output model, an economic model of flow prediction between sectors Industrial and organizational psychology, the field of psychology that studies the workplace Industrial organization, the field of economics that studies the behavior of firms

Music i/o (album), an album by Peter Gabriel (2023) "i/o" (song), song by Peter Gabriel (2023) Input/Output (EP), a 2003 EP by The Letterpress I/O, a 2004 album by the Canadian rock band Limblifter Input/Output, a contemporary Christian children's song on the 1984 Bill Gaither Trio LP entitled (Ten New Songs With Kids...For Kids About) Life

Other uses I/O (visual novel), a Japanese science fiction visual novel by Regista

See also IO (disambiguation) Google I/O Input and output (medicine)