Proper noun
HPFS
(computing) Initialism of High Performance File System, a file system used by the OS/2 operating system and early versions of Windows NT.
When Microsoft created their new operating system, they borrowed many of these concepts for NTFS. citation Probably as a result of this common ancestry, HPFS and NTFS use the same disk partition identification type code (07). Source: Internet
Trying to copy a file with any ADS other than EAs from an NTFS volume to a FAT or HPFS volume gives a warning message with the names of the ADSs that will be lost. Source: Internet