Sources:

Beowulf Clustering Website, http://www.beowulf.org/.

Parallel Virtual Machine Website, http://www.netlib.org/pvm3/.

BEOWULF HOWTO, BEOWULF INSTALLATION and ADMINISTRATION HOWTO,

and Parallel Processing HOWTO, http://metalab.unc.edu/pub/Linux/Documentation/HOWTO.

BEOWULF FAQ and Parallel-Processing FAQ and all the mini-FAQs from the Internet.