An I/O device (input/output) refers to the communication between an information processing system and another processing system or the outside world.
I/O device
IC
ICASA
ICCID
IEEE 802.15.4 standard
IMEI
IMSI
Infinita Services
Interface
IP
ISO 14001:2004
ISO 9001:2000
ISO/TS 16949:2009
ITU