Does the Sequoia (MacOS 15) Calculator have RPN option?

[jdw13]

Does the new Sequoia (MacOS 15) Calculator retain the RPN option we have in Sonoma (MacOS 14)?

 

[WilliApple]

What are RPN Options, and what does it stand for?

 

[SpaceGrayAlways]

It appears to.

 

[Nermal]

What are RPN Options, and what does it stand for?

Wikipedia can explain it better than I can.

Reverse Polish notation - Wikipedia

en.wikipedia.org

 

[jdw13]

What are RPN Options, and what does it stand for?

It is Reverse Polish notation (see Reverse Polish notation), which does not use equal sign, and does not need parenthesis as intermediate results go up a stack which is very intuitive and easy for me to use. It is the model that the HP calculators used in the late 70s and 80s. Easy to use is probably probably what you are used to but I find using the algebratic notation on calculators very annoying and error prone.

 

[OAG7]

Yes it has RPN selection in the menu.

 

[raythompsontn]

It is the model that the HP calculators used in the late 70s and 80s

The first RPN calculator from HP, the HP-35, arrived in 1972 and used RPN.

 

[jdw13]

The first RPN calculator from HP, the HP-35, arrived in 1972 and used RPN

You got me curious, a quick search shows the idea goes back to at least 1951. The HP museum site claims
"RPN is formally traced to prefix and postfix mathematical systems proposed by Jan Lukasiewicz in 1951" and it would not surprise me if the same or similar models of doing mechanical arithmetic could be found. They also show HP9100 in 1968 was doing a form of RP and have a nice Evolution of RPN at HP on this site.

 

[DoctorFedora]

Edit: never mind, I misread the original post