Once upon a time, the only computers that existed were mainframes that served armies of users on dumb terminals, mechanical teletype and punchcard machines. These were the days before mice and windows, when the giant airconditioned hosts were used for serious military, scientific and commercial applications and were kept running by a very serious priesthood of IT professionals and engineers. And, in addition to fuelling some very real macho fantasies of centalised power and control, mainframe computers cost plenty to buy and run.


