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Features:Excalibur for Windows 32-bit version is a freeware full featured RPN-only calculator. This is a serious calculator for serious users. It will only run under Windows 98, NT, 2K and XP. Excalibur takes up a small amount of resources for all it does so well. This is the long awaited update to the venerable 1.06 that has been out for years. This new 2.00 version contains a host of new features and better Win2K and XP support.
just download and unzip (<500k) in a folder of your choice. bad news for some - saves it's settings in the 'Application Data' folder i.e.Powerful RPN entry. 300 Functions (scientific, business, conversion, computer science, physics, complex numbers, geometry, vectors, etc). Full 4 or 8-level stack. International support for different comma and decimal point formats. Programmable, macros, registers, custom button banks, etc.
C:\Documents and Settings\<user>\Local Settings\Application Data
note: prior to this it saved it's settings in the 'windows folder' which made it unusable for me at least, as a portable app.