Actually there IS a backspace key but it doesn’t correct an error. You had to erase the typo and type it over.
You had to erase the typo and type it over.”
I remember when the original White Out came out. Somebody always forgot to screw the lid back on tightly and then it dried and you had to add thinner. Or you put too much on the paper and then had to blow on it to get it to dry. Sometimes the correction cover - like paint - would pop off and you could see the incorrect letter below. Had to be careful erasing errors on onionskin or you had a hole in the paper. We were so delighted when those white out strips came along. No more liquid to mess with. Interesting times.