Visual Smalltalk Enterprise
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Visual Smalltalk Enterprise (VSE) is a Smalltalk dialect that runs only on Microsoft Windows, and is the last in a long line of Smalltalk implementations first produced by Digitalk.
VSE is now only available as a special patch version called VSE 2000 available from Cincom, but only if you already have a license for a previous VSE version.
VSE is still quite widely used, though.