i

IAHSSP
International Association of Home Safety and Security Professionals.

IC
abb. interchangeable core

impressioning
A means of fitting a key directly to a locked cylinder by manipulating a blank in the keyway and cutting the blank where the tumlbers have made marks.

incidental master key
n. a key cut to an unplanned shear line created when the cylinder is combinated to the top master key and a change key

increment
n. a usually uniform increase or decrease in the successive depths of a key cut which must be matched by a corresponding change in the tumblers

interchangeable core
n. a key removable core which can be used in all or most of the core manufacturer`s product line. No tools (other than the control key) are required for removal of the core.