Elektronika MK-61 operation?

[james summers]

Thanks Eddie, I'll look into that for the iPad.

Fortunately, my MK-61 has now arrived. I thought the decimal point key was a bit iffy but eventually realised that if I want to enter a number between 0 and 1 I need to enter 0 first and then the point, I can't just press the point and then the digits after it as it only recognises the point if it comes after a digit (including 0).

Trying Richard Nelson's 5, ENTER, CHS, 2, + test from his HP RPN Evolves article in HP Solve #27 shows that the MK-61 follows case 2 of Classical RPN returning 7, similar to most of the Classics and Woodstocks.

The exploration continues.....

Edit: corrected "...Richard Nelson's 7, ENTER, CHS, 2, + test..." to "...Richard Nelson's 5, ENTER, CHS, 2, + test..." - thanks for the spot, Joe.