advantages of RPN

[Alvaro]

Let me say like this: There are much better options.

If the HP50g had a BASIC language on it I am sure it would be the "Ultra Calculator of the Century".

My personal opinion is that it will be very difficult to find something worst than UserRPN as a "programing Language".
While I agree that for manual calculations there is some advantage of PRN, I even like it, but as a "Programing Language" is the worst I can imagine.

UserRPL is very difficult to read, to follow.
UserRPN makes heavy usage of the stack. So, while READING or PROGRAMING you have to do a big effort to follow what is happening on the Stack what makes it much difficult to read, besides the huge usage of all sort Brackets.

Not forgetting the unpossibilty of programing on a Desktop PC, run it there and transfer the ready Programm to the HP

I disagree of the advantage people are saying about "user interact" with stack. For me that is something like "marketing".