High Quality Content by WIKIPEDIA articles! A creator ID or type ID is a unique 4-character identifier for an organization, product, or file format. Most notably used on the Apple Macintosh to represent individual applications and file types. Creator IDs are similar to stock ticker symbols in both use and form. Unique 4-character identifiers are common to many sectors in the computer industry. For example, USB devices broadcast their manufacturer's ID and their device ID to the host operating system. The host then uses this information to determine which device driver to map to the device. Palm OS, heavily influenced by Mac OS, also uses creator IDs to determine which application owns what data.

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