SR-50/51 vs RPN

[Matt Agajanian]

Hi all.

While HP has maintained RPN, it seems to me that the Sum of Product logic in the SR-50/51 would be more cumbersome in comparison.

With the way the Sum of Products hierarchy system plays out and with the absence of parentheses, I would think that the 50/51 would require a good chunk of equation rearrangement and intermediate storage register use which would make RPN a more usable and efficient entry system.

Any thoughts?