Abstract: Methods and apparatus for caching files in DOS based computer systems are disclosed wherein the computer systems include a nonstandard drive in which files have been stored and from which files can be accessed, retrieved or written to, a computer CPU for generating instructions for accessing, retrieving or writing portions of desired files, wherein said instructions for accessing, retrieving or writing are generated through the use of DOS interrupt 21 and a drive, recognized by the computer CPU as a DOS drive, for storage and access, retrieval or writing of files, wherein the access, retrieval or writing of files from the drive can be achieved faster than access, retrieval or writing of files from the non-standard drive.