This was still trivial to get around on calculators: on a TI 83/84 you could simply archive any programs you wanted to survive a memory wipe, then un-archive th

This was still trivial to get around on calculators: on a TI 83/84 you could simply archive any programs you wanted to survive a memory wipe, then un-archive them after the wipe. This trick was widely employed by students in my high school who stored notes/equations by using programs as generic text files.