When I started at Carnegie Mellon University (CMU) in 1972, I joined Gordon Bell's research group just as he started to explore multiprocessor systems. Later in 1972, Sam Fuller joined the research group and the Computer Module project was born. Cm* (Computer module replicated one or more times as indicated by the Kline star) was an extensible architecture with shared address space across a local bus, extending to a cluster bus, and to intercluster links realizing the first non-uniform memory access (NUMA) multiprocessor [18]. By the end of the 1970s, industry became very interested in multiprocessor systems and it became difficult for university design teams primarily composed of students to keep pace with professional engineering teams with more resources in designing higher speed and ever more complex logic.