Bill Gates : IBM designer insisted on triple - key ##ing on PCs for security reasons . But Gates said Alt - Alt - Alt was a ` ` . '' Engineer David Bradley , a designer on early IBM computers , said he invented the combination as a shortcut during development . The designer credited with the shortcut has deflected responsibility . Gates made comment at a recent Stanford University event .
Bill Gates : IBM designer insisted on triple - key ##ing on PCs for security reasons . But Gates said Alt - Alt - Alt was a ` ` . '' The designer credited with the shortcut has deflected responsibility . Gates made comment at a recent Stanford University event .