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Short for High Performance File System, a file system created specifically for IBM��s OS/2 to improve upon the limitations of the FAT file system. Among its improvements include support for mixed-case file names and long file names (256 characters as opposed to FAT��s 11 characters), more efficient use of disk space (files are not stored using multiple-sector clusters but on a per-sector basis), an internal architecture that keeps related items close to each other on the disk volume, less fragmentation of data and a centrally-located root directory.

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