CBA Program Storage: RAM and Archive
The TI-83 Plus has a very important advantage in its ability to move any program from RAM into the much less accessible archive memory. Students who are using the Plus will need to become familiar with managing the memory or their calculator. Shifts between RAM and archive are most readily accomplished by pressing [2nd] [MEM] and then selecting , which is memory management and deletions. Then press  for programs. From this point, archiving and unarchiving are simply a matter of pressing [ENTER].
For further comments, see Tricks of the Trade; sub-heading: Link transfers.