Solution 12316: Utilizing Memory Functions on the TI-36X Solar.
How do I use memory functions on the TI-36X Solar?The procedures below describe how to use the memory functions on the TI-36X Solar.
Store Key Sequence:
With the number to be stored in the display of the calculator, press the [STO] key, and then a number 1, 2, or 3. (This calculator has 3 different memory slots available).
Recall Key Sequence:
Press the [RCL] key, and then either 1, 2, or 3 (depending on which memory space is to be recalled to the display).
To clear one of these memory spaces, enter  [STO] and 1, 2, or 3.
These functions are also described on page 20 of the TI-36X Solar Guidebook.