Slot The slot number is the physical location of the I/O module. This may be a combination of the rack number and the slot number when using expansion racks. Word and Bit The word and bit are used to identify the actual terminal connection in a particular I/O mod- ule.

International Game Technology (IGT) is an American gaming company based in Las Vegas which manufactured and distributed slot machines and other gambling technology. It was acquired in 2024 by GTECH, which then adopted the IGT name.