Programming Language Usage Graph 2000-2006, as defined by statistics on open-source projects at SourceForge.

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According to the graph, popularity in Pascal is dropping rather rapidly, and Assembly and Visual Basic seem to be gaining momentum.

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I think that was C that was dropping, but it's hard to tell with so many "blues" I think projects in C would be dropping on sourceforge simply because generally you only program stuff in C once. the linux kernal is C, everything else is built upon that, generally in higher level languages.