You should only submit your site to this category if you sell Beowulfs.

If your organization has one Beowulf, please submit your site to Beowulf/Cluster_Sites. If you sell individual Linux systems, please submit to Computers/Software/Operating_Systems/Linux/Vendors. Companies that provide other hardware related to cluster computing (for example, high-speed network cards) or parallel systems that are not Beowulfs are listed in Computers/Parallel_Computing/Vendors.