The History of CTRL ALT DELETE.
"Bradley chose the keys by location—with the del key across the keyboard from the other two, it seemed unlikely that all three would be accidentally pressed at the same time. Bradley never intended to make the shortcut available to customers, nor did he expect it to enter the pop lexicon. It was meant for him and his fellow coders, for whom every second counted."
https://www.mentalfloss.com/article/51674/history-ctrl-alt-delete