IIRC it was an applet that hooked the key shortcuts and menu entries for a wipe, and the really advanced ones would drop you into an imitation shell that appear

IIRC it was an applet that hooked the key shortcuts and menu entries for a wipe, and the really advanced ones would drop you into an imitation shell that appeared as a freshly wiped calculator would, but there was a magic keystroke to drop back to the (untouched) main system. Edit: found it, or a similar one: https://brandonw.net/calculators/fake/ https://brandonw.net/calculators/fake/