Deep learning accelerators reminiscent of GPUs, FPGAs, and more lately TPUs. The Selective Sequence Electronic Calculator (SSEC) project, led by IBM engineer Wallace Eckert, uses both relays and vacuum tubes to course of scientific knowledge on the fee of fifty 14 x 14 digit multiplications per second. Before its decommissioning in 1952, the SSEC produced the moon place tables utilized in early planning of the 1969 Apollo XII moon landing. These tables have been later confirmed through the use of extra fashionable computers for the precise flights. The SSEC was one of many final of the technology of ‘tremendous calculators’ to be built using electromechanical technology.