from the I-thought-it-was-programmable department:
Anyone know what the K key does on my Texas Insturments SR-40 (I'ts got an LED
display, it 'gots' to be old!)
I have googled, I found lots of stuff on a signal processor (?) with that
name, and a few pages that show the calculator, and give a date range for
Mfg. but nothing that describes the keyboard.
I tried pressing the K key in several cases
5 sin = 5 K sin
543 = 54K3 (K does not end a number )
tis a puzzlement. : ^ )