What is the meaning of Alt-Ctrl-Delete?

Alternative way to check if CTRL+ALT+DEL screen is visible ctrlaltdel A tri-weekly webcomic about video games and gamers since 2002! ctrlaltdel Listen to CTRL + ALT + DEL on Spotify Rêve · Song · 2021

ctrlaltdel In the past, when our computers stopped working or crashed, we would see a never-ending spinning hourglass and we knew it was time to press 3 keys: Ctrl