Texas Instruments TI-83 PLUS - Manual (Page 611)

TI-83 Plus Memory and Variable Management 608
Resetting All Memory
When resetting all memory on the TI-83 Plus , RAM and user data
archive memory is restored to factory settings. All nonsystem variables,
applications, and programs are deleted. All system variables are reset to
default settings.
Tip: Before you reset all memory, consider restoring sufficient available
memory by deleting only selected data.
To reset all memory on the TI-83 Plus , follow these steps.
1. From the
RAM ARCHIVE ALL
menu, press ~ ~ to display the
ALL
menu.
2. Select 1:All Memory to display the
RESET MEMORY
menu.