According CNN, Bill Gates (Microsoft co-founder) expressed that the Control-Alt-Delete function originally used to get into Windows computers is an awkward maneuver. He stated on a panel at the Bloomberg Global Business Forum " If I could make one small edit, I'd make that a single key” He also stated “"We could have had a single button. But the guy who did the IBM keyboard design didn't want to give us our single button," Gates said at a Harvard University event at the time*
Source: http://money.cnn.com/2017/09/20/technology/bill-gates-control-alt-delete/index.html *