 They also worked with Pat Greene an inventor in Boston of Triad Company who held a patent on a Bill Validator which could read bar coded tickets as well as accept cash.MGM created a consortium of game manufacturers and developed a protocol for its custom Universal Interface Board "UIB" based on a derivative of Bally Gaming's SDS System.They contracted local firm Applied Computer Technology, Inc. to develop the UIB, its firmware, and also facilitate the organization of the consortium.