<P> During World War II , the British at Bletchley Park achieved a number of successes at breaking encrypted German military communications . The German encryption machine , Enigma , was first attacked with the help of the electro - mechanical bombes . To crack the more sophisticated German Lorenz SZ 40 / 42 machine , used for high - level Army communications , Max Newman and his colleagues commissioned Flowers to build the Colossus . He spent eleven months from early February 1943 designing and building the first Colossus . After a functional test in December 1943 , Colossus was shipped to Bletchley Park , where it was delivered on 18 January 1944 and attacked its first message on 5 February . </P>
<P> During World War II , the British at Bletchley Park achieved a number of successes at breaking encrypted German military communications . The German encryption machine , Enigma , was first attacked with the help of the electro - mechanical bombes . To crack the more sophisticated German Lorenz SZ 40 / 42 machine , used for high - level Army communications , Max Newman and his colleagues commissioned Flowers to build the Colossus . He spent eleven months from early February 1943 designing and building the first Colossus . After a functional test in December 1943 , Colossus was shipped to Bletchley Park , where it was delivered on 18 January 1944 and attacked its first message on 5 February . </P>
when were the first computers invented and used
when were the first computers invented and used
1944
1944