Think of it as a 10-digit fingerprint for a font. The standard includes "special values 'Any' (0) and 'No Fit' (1)" for every category, allowing flexible mapping in applications.
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If you are using a standard Windows or macOS computer, . It is part of the operating system's core files. You are legally allowed to use it to create, display, and print content using your licensed Microsoft or Apple product. Think of it as a 10-digit fingerprint for a font