Lustre a network clustering FS.  
   An offshoot of AFS, CODA, and Ext2.
   http://www.lustre.org/

Coda File System  
   CMU's advanced networked File System
   http://www.coda.cs.cmu.edu/

FHS  
   Filesystem Hierarchy Standard
   http://www.pathname.com/fhs/

AFS II  
   Andrew File System II
   http://andrew2.andrew.cmu.edu

DFS  
   Distributed File System
   http://cs.gmu.edu/~menasce/osbook/distfs/

xFS  
   Serverless Network File Service
   http://now.cs.berkeley.edu/Xfs/xfs.html

Filesystems HOWTO  
   Describes a wide variety of filesystems and instructs you on how to access them from a wide variety of operating systems.
   http://www.penguin.cz/~mhi/fs/

AFS  
   Andrew File System
   http://www.cs.cmu.edu/afs/andrew.cmu.edu/usr/shadow/www/afs.html

BootFS  
   A simple filesystem for loading Unix operating systems.
   http://penguin.cz/~mhi/fs/bfs/bfs-structure.html

EXT3 File System mini-howto  
   Information on migrating from the Ext2 to Ext3 file system.
   http://www.symonds.net/~rajesh/howto/ext3/

ARLA  
   Arla is a free AFS implementation
   http://www.stacken.kth.se/project/arla/

SFS  
   A networked file system which provides security over untrusted networks.
   http://www.fs.net/

Solid File System (SolFS)  
   A single-file virtual file system for Delphi (VCL), .NET, Windows, Linux, PalmOS, PocketPC.
   http://www.solfs.com/