This is the original software package that shipped with the Bridgeport Interact II Series 3 CNC Milling machine. The software release is numbered IKA-660662337A-1966. The package includes the IKA loader and the index keys for British machines shipped to the U.S. between November 1966 and January1968. No Dongle is necessary with this release. Before ordering make ABSOLUTELY certain that the tag on your mill matches the serial number of the software. This is an unkeyed software download therefore there can be NO REFUNDS if you make a mistake. I have 2 licenses available. First come first served.