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| This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist. |
The file system recognizes file names as special device files if the file names consist of exactly three uppercase letters, a single digit, and a colon (:). This format follows the convention established in the Microsoft MS-DOS operating system for serial and parallel ports. For example, COM1:, PGR7:, and GPS0: are valid device file names, but MODEM1:, COM27:, and LPT1 are not.
Last updated on Tuesday, July 13, 2004