@sh3llcmdr @Rob_T_Firefly @thegibson
With 1K of RAM, I usually never *needed* to back up incomplete work to tape!
Whether I was typing in listings from magazines or books, or coding my own ideas, there was always some testing and debugging needed. My "save early, save often" was usually one save every couple of hours, after finding and fixing a typo. Saving the new version on top of the previous one on the same cassette. No version numbering, no revision control. That came later (much later).