EDIT to Delete Forever
I heard the funniest usability story in my Software Engineering class today. One of the professors was talking about an old system that supported one level of undo. Apparently, if you pulled up a document and typed “edit,” you would delete the entire document forever. How?
E = Select entire document
D = Delete selection
I = Insert mode
T = {Types the letter T}
Since there’s only one level of undo supported, you’re left with a document with the letter t, and undo will get rid of that one letter for you. Awesome.