Patent ID: 7664783

Claim:
A file management program stored in a computer-readable medium for managing a file or a directory by means of a long filename of a file system that corresponds to a long filename for retrieval and a short filename of the file system that corresponds to a short filename for retrieval, the file management program comprising: having a computer perform a naming function for naming the short filename including at least one part of file management information in the file system that corresponds to the long filename for retrieval; the short filename including a first character corresponding to a character at a head of the long filename, a second character corresponding to a number of directory entries required for storing all characters of the long filename, a third character and a fourth character, the third character and the fourth character corresponding to a total number of characters of the long filename in hexadecimal form, a fifth and a sixth character, the fifth and the sixth character corresponding to a number of remaining characters for a file path for the file or the directory in hexadecimal form, and a seventh character corresponding to a serial number for the short filename having other equal characters in hexadecimal form.