The tutor covers a simple, yet powerful feature of the Texas Instruments TI-30xa.

Using the memory can save time in multi-step calculations. With the TI-30xa, here’s how:

1. Enter the number you want to store on the display. (It can also appear there as the result of a calculation.)
2. Press the STO key, then 1, 2, or 3. (The calculator has three separate memories.)
3. To retrieve the stored value, press RCL, then 1, 2, or 3, depending on which memory you stored it to.
4. Storing a value in a memory overwrites what was there previously.
5. To clear a memory, simply store the value 0 in it.

When something is stored in a memory, M1, M2, or M3 will appear at top left of the display.

As a kid in high school, I used a TI scientific similar to the TI-30xa. Its memory was a feature I particularly appreciated.:)

Source:

Texas Instruments TI-30Xa Solar. Dallas: Texas Instruments, 2001.

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.