TI-83 Plus Operating the TI-83 Plus Silver Edition 28
You can use DRAW STO menu items to store and recall graph
databases and pictures (Chapter 8).
Although most variables can be archived, system variables including
r, t, x, y, and q cannot be archived (Chapter 18)
Apps are independent applications.which are stored in Flash ROM.
AppVars is a variable holder used to store variables created by
independent applications. You cannot edit or change variables in
AppVars unless you do so through the application which created
them.