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

SFS Secure File System http://www.cs.auckland.ac.nz/~pgut001/sfs/

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/

Novel OS Work By Christopher Browne. Very brief, clear descriptions and some critiquing of many OSs, mostly research types, with many links. Puts much current activity in larger context. http://cbbrowne.com/info/osnovel.html