The Computer Know-how (CT) program has been developed to provide training in the rules underlying the design of modern computer techniques. While many early digital computer systems have been based mostly on similar designs, such because the IAS and its copies, others are distinctive designs, just like the CSIRAC. Inbuilt Sydney, Australia by the Council of Scientific and Industrial Analysis to be used in its Radio physics Laboratory in Sydney, CSIRAC was designed by British-born Trevor Pearcey, and used unusual 12-hole paper tape. It was transferred to the Division of Physics on the University of Melbourne in 1955 and remained in service till 1964.