A cryptanalytic computer is a computer designed to be used for cryptanalysis, which nowadays involves massive statistical analysis and multiple trial decryptions that since before World War II are possible only with automated equipment. Polish cryptanalysts designed and built automated aids in their work on Enigma traffic. Arguably, the first modern computer was built for cryptanalytic work at Bletchley Park during the war. More modern computers were important after World War II, and some machines are reported to have had machine instructions hardwired in at the request of NSA.