Board Thread:Questions and Answers/@comment-25139420-20140708143753/@comment-14600979-20140708144906

See http://petitcomputer.wikia.com/wiki/MEM%24_%28System_Variable%29

In short, you assign whatever string to that

MEM$="Mcb2yV-=%Ao]@b _qe-0"

up to 256 characters.

And then you just SAVE"MEM:"

Then when you want it back after the resources are cleared in some way (exiting), you LOAD it, and your string is found in MEM$