Information on the Web is rapidly growing, and mathematical topics are no exception.
But, information was mostly static. Some mechanism to add interactive features are
 | CGI Scripts |
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special access required |
 | Hyperlink to, say, Maple |
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software package required |
 | Plugins |
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download and updating required |
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 | everybody can do it |
 | no installation required |
 | runs on any platform |
 | Java tools available for free |
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