IC card(integrated circuit card): A card with a built-in semiconductor-based integrated circuit. Also called a smart card. IC cards are capable of both reading and writing data, and have a larger storage capacity and greater durability than magnetic cards, so the data stored on them is not damaged by contact with magnets. In addition, because IC cards can be fitted with various security functions such as data encryption and configured to be compatible only with readers that have particular specifications, they are also excellent in terms of security and functionality.

I/O: Short for input/output.

I/O device: A device that performs an information input/output function.

IK rating: An international rating system that defines the degree of product protection against physical impacts.

IP rating: An international rating system that defines the degree of product protection against solids and liquids.

Import: The act of transferring data from one computer into its own system.

Intercom: A communication system that is generally installed in a building or institution by using a Private Branch eXchange (PBX).

Interlock Zone: A zone between two or more doors. In this zone, if one door is open or has been unlocked, the rest of the doors will be locked. This zone is generally applied to laboratories and manufacturing facilities where suspended particulate matter in the air such as dust needs to be controlled, or places where this is required for security and safety reasons.

Intrusion Alarm Zone: A zone set to emit a warning sound or relay signal if an unauthorized person attempts an intrusion after Arm. This zone normally begins monitoring after the day's work, and emits a preset alarm or signal when an intrusion attempt is detected.

ISO 19749-2: An international standard published by ISO that defines the fingerprint format information using the minutiae of fingerprints.