VBScript

Spawn of Visual Basic VBScript's roots are in Microsoft's Visual Basic product. VBScript is a slightly augemented (with regular expressions and a few other pieces) subset of Visual Basic. VBScript can usually be mixed into Visual Basic applications easily.
VBScript in the browser VBScript is a Microsoft-only phenomenon. Internet Explorer is the only browser platform on which VBScript is supported. As a result, VBScript client-side code is typically only used on IE-only intranets.
VBScript on the server VBScript is commonly used with Microsoft's Active Server Pages.
VBScript and Unicode VBScript provides some functions (like ChrW) for Unicode support, but defaults to Windows ANSI.