Texas Instruments TI-83 3. Select variable types from the list to display memory usage.

TI-83 Plus Memory and Variable Management 598
3. Select variable types from the list to display memory usage.
Note: Real, List, Y.Vars, and Prgm variable types never reset to zero, even
after memory is cleared.
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.
To leave the MEMORY MANAGEMENT/DELETE menu, press either
y 5 or ‘. Both options display the home screen.