When I was a little kid in the 80s, there was a SQRT function on my calculator and I would typ in numbers then hit that button and log the results in a scratch

When I was a little kid in the 80s, there was a SQRT function on my calculator and I would typ in numbers then hit that button and log the results in a scratch pad... and the thing is that even using the M/MR/MC feature was foreign to me...