This is the same B5000 that Dr. Kay mentions in several of his talks. Kay has often said that he saw the same idea three at least three different times before

This is the same B5000 that Dr. Kay mentions in several of his talks. Kay has often said that he saw the same idea three at least three different times before he fully appreciated the concepts that he later labeled ‘OOP’. Besides the B5000 (designed by Bob Barton), other proto-OOP systems were Sketchpad (Ivan Sutherland), Simula, and even the proto-Internet (that was known as the ARPAnet).