This document discusses different types of computers and parallel computing. It begins by mentioning super computers, mainframes, mini computers, microcomputers, and cloud computing. It then focuses on super computers, noting they were introduced in 1960 and can process up to 8-16 petaflops per second, being used for weather forecasting and research in fields like physics and chemistry. The document then discusses types of parallel computing, including shared memory parallel computers which allow processing units to communicate via shared memory with either uniform or non-uniform access times.