Matthias Felleisen 4f24983d29 renamed world to iworld, for internal ... svn: r13588		2009-02-15 01:11:24 +00:00
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scribblings	renamed world to iworld, for internal	2009-02-15 01:11:24 +00:00
universe.ss	added universe via a 2htdp teachpack	2009-01-03 02:38:09 +00:00