demo 1st 2nd 3rd 4th 5th Period 1940 – 1956 1956 – 1963 1964 – 1971 1972 – 2010 2010-till date Components Vacuum Tubes Transistor Integrated Circuits – ICs Microprocessor, Large Scale ICs Silicon Chips, ULSI,AI Computer EDVAC,ENIAC,EDSAC UNIVAC IBM-1401 IBM-370 PDP 11 NoteBook UltraBook....