[plt-scheme] v4 top-level based languages in DrScheme

From: Grant Rettke (grettke at acm.org)
Date: Mon Apr 14 12:51:15 EDT 2008

>  Nevertheless, one reasonable use of the "MzScheme" language was for
>  interactive exploration. For example, you might want to try something
>  like

Nice! Thus far I have always created separate files for experimenting.

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