Excalibur for Windows 32-bit version is a freeware full featured RPN-only calculator. This is a serious calculator for serious users. Excalibur takes up a small amount o...
What is Excalibur?
Excalibur for Windows 32-bit version is a freeware full featured RPN-only calculator. This is a serious calculator for serious users. Excalibur takes up a small amount of resources for all it does so well.
Excalibur does not use more conventional "algebraic" notation like many low-end calculators on the market. Instead it uses the high-powered parenthesis-free RPN notation (Reverse Polish Notation). This notation was named in honor of a Polish mathematician and logician named Jan Lukasiewicz. Polish notation places the operators in an expression before the numbers. RPN places them after the numbers (which is why they call it Reverse Polish Notation)
RPN is really nothing more than the method of entry of numbers and operators into the calculator.
The website is unavailable, but the app can still be downloaded from third-party websites.
Comments and Reviews
CategoryEducation & Reference
Recent user activities on Excalibur
- POX edited Excalibur
- prenx4x added Excalibur as alternative(s) to Hissab - Calculator with Superpowers
- Windows-Portable-Apps added Excalibur as alternative(s) to Multi Sum Calculator
I have been using Excalibur for years. It is an excellent calculator. Very small footprint, reasonable interface, stand-alone (i.e., keeps out of the windows registry).
The reverse Polish notation actually works the way people. When you add two numbers you know the numbers in advance and add them. For example, when you add 3 to 4 you really operate (3, 4)+. This is exactly the way RPN works. You enter the two numbers then add them.
"Algebraic" notation (as a PhD in Abstract Algebra, I don't like that name) changes the meaning of = from 'equals' to 'do'. Yutch.
I had use it since 2002 and it is a good calculator. I checked some results against real calculators and never find any error. It runs from windows xp until now on windows 10.