PATH Mac OS 8 and 9 Developer Documentation > Text Encoding Conversion Manager
Programming With the Text Encoding Conversion Manager

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Corporate Use Zone

Code space in the Unicode standard is divided into areas and zones. One area, called the Private Use Area, includes a zone called the Corporate Use Zone.

Some characters which are in Mac OS encodings but not in Unicode are mapped to code points in the Unicode Corporate Use Zone. This permits round-trip fidelity for these characters. The Apple logo is an example.

Apple provides a registry of its assignments in the Unicode Corporate Use Zone that you can check to ensure that you don't use the same code representations. The URL is http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/CORPCHAR.TXT.

Although they allow the Unicode Converter to guarantee perfect round trips for certain code representations, characters in the Unicode Corporate Use Zone are not portable to other systems.