[Coco] String Packing

[tim franklinlabs.com]

   Years ago, I remember using a method in basic to pack a string with
   extended data such as extended ASCII and binary programs. The data was
   stored in a string and saved with the program. When the program was
   loaded, the data was already packed and there was no need to pull it
   out of a data line.
   Does anyone remember this technique? And remember how to do it?

   Just curious... I'm old and can't remember hoe it was done.