Seymour Cray was a famous computer designer who left Burroughs Computer and started Cray.
The Cray supercomputers were designed to have the highest level of computing performance possible. It was focused on science, engineering and mathematical model problems.
They often had very different design ideas from "normal" mainframe designs. For instance, using precisely measured optical cables to create a precise amount of delay in communication between CPUs.
The Cray systems were focused on vector computing as a way to increase performance - they could perform 1 instruction on multiple pieces of data in a "vector" ( a single line of numbers) each clock cycle.
What's at the LSSM: