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Windows Glyph List 4, or more commonly WGL4 for short, also known as the Pan-European character set, is a character repertoire on Microsoft operating systems comprising 657 Unicode characters, two of them private use. Its purpose is to provide an implementation guideline for producers of fonts for the representation of European natural languages; fonts that provide glyphs for the entire set of characters can claim WGL4 compliance and thus can expect to be compatible with a wide range of software.
As of 2004, WGL4 characters were the only ones guaranteed to display correctly on Microsoft Windows. More recent versions of Windows display far more glyphs.
Because many fonts are designed to fulfill the WGL4 set, this set of characters is likely to work on many computer systems. For example, all the non-private-use characters in the table below are likely to display properly, compared to the many missing characters that may be seen in other articles about Unicode.