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Ratiocinator is a simple pocket calculator that uses Roman numerals. A summary of writing rules is included.

What's New

Version 2.2.0:
  • Universal Binary, fully compatible with MacOS 10.2 to 10.5, both languages in one application.


Mac OS X 10.2 or later

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Ratiocinator User Discussion

4.6 2


Current Version (2.x)


Downloads 3,397
Version Downloads 260
License Free
Date 15 Aug 2008
Platform OS X / PPC 32 / Intel 32
Price Free
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