This category contains sites of companies that either sell supercomputers or sell time on supercomputers. While there are many types of computers that can be classified as supercomputers, this category is for the sale of the specific sort of supercomputer that is sold as one unit (if the product can be classified as a 'cluster', it's a parallel computer, not a supercomputer) and is not manufactured from commodity hardware (that's a Beowulf).

Companies that sell parallel computers are listed in Computers/Parallel_Computing/Vendors, and companies that sell Beowulfs are listed in Computers/Parallel_Computing/Beowulf/Vendors.