The CRAY-1 was the world's fastest supercomputer in the 1970s. Unveiled in 1976, it had a clock speed of 80MHz and computational rates of 138 MFLOPS sustained and 250 MFLOPS in bursts. The CRAY-1 was a vector processor that used techniques like chaining and vectorization to achieve high performance. It had a unique physical design of 12 wedge-shaped columns and pioneered new cooling technologies. The CRAY-1 established the class of supercomputers and paved the way for modern high performance computing.