Brief History of GUI, A

History a Brief History of GUI Graphic User Interfaces were considered unnecessary overhead by early computer developers, who were struggling to develop enough CPU horsepower to perform simple calculations. As CPU power increased in the sixties and early seventies, industrial engineers began to study the terminal entry programs of mainframes to optimize entry times and reduce mis-types. The earliest mainframe query protocols still in use, i.e., airline reservation systems, were developed during this period to queue as much information as possible into the shortest command. Essentially, operators were trained to perform computer language interpretation in their heads.