“When the first mainframes were sold, even IBM did not imagine a global market larger than a few thousand devices. Mainframes were the province of the largest governments and enterprises, used to execute complex managerial and operational tasks. Thanks to technological progress that has been both relentless and predictable, mainframes were supplemented first by minicomputers, then microcomputers, personal computers, and most recently, smartphones and tablets. Next up: smart devices & IoT.”