why prime has two modes? RPN and CAS?

[lemontea]

Dale, what you say is very true. I do agree a large part has to do with simply the "fun" of having a new "toy" around. But more and more I see that when the need strikes to perform a computation, it's more handy to have a handy device around than to go to the computer and then spend perhaps up to a minute loading the spreadsheet, loading the files, etc. And the calculator itself has an integral numeric keypad.

Also, regarding desk space, unfortunately that is at a premium for me, haha, so actually it takes up more space to have a laptop on my desk than a calculator.