Calc-42S
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RPN programmable calculator; emulation of the Hewlett-Packard HP-42S. You can dowload an alpha here : Image:Free42.xo
Contributors : Tom Schum,
An OLPC-optimized skin requires by-hand installation of skin files into a .sugar subdirectory at the moment; to be integrated into future bundles directly.
Note: existing "standard" or "realistic" calculator image (skin) appears inconveniently small on OLPC screen, but all keys, functions, etc are working.
Project home site is http://free42.sourceforge.net/
Miscellaneous useful information, OLPC skin files, how to install them, etc: http://mysite.verizon.net/vzesfls5/files/id10.html
A Linux TAR archive file containing both OLPC skins and the benchmark program is now downloadable (instructions provided).
RPN in 25 words or less: "Give the calculator the numbers, then tell it what to do with them."