http://www.macnn.com/articles/02/06/10/equation.graphing/
Equation graphing app adds Spanish interface
updated 08:00 am EDT, Mon June 10, 2002
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Pedagoguery Software has released GrafEq 2.11, an update to its equation graphing program that brings Spanish interface and a streamlined system for user preferences. The $60 ($36 for students) software generates graphs by "constructing rigorous mathematical proofs and is based on state-of-the-art research in reliable computing." It is also available with English, a Dutch, a French, and a Korean interfaces and only runs on Classic.
