High Performance File System
HPFS is a file system created specifically for the OS/2 operating system to improve upon the limitations of the FAT file system. It was written by Gordon Letwin and others at Microsoft and added to OS/2 version 1.2, at that time still a joint... Wikipedia
Developer: Microsoft Corporation, IBM, and Gordon Letwin
Allowed filename characters: Single-byte from to
Bad blocks: List
File allocation: B+ tree
File system permissions: Yes (only in HPFS386)
Introduced: November 1989; 34 years ago with OS/2 1.2
Max file size: 2 GB