Vacuum tubes and digital electronic circuits

Simply electronic circuit elements soon replaced their mechanical and electromechanical equivalents, as well that digital calculation replaced analog. The engineerTommy Flowers , working with the Post Office Research Station in London in your 1930s, began to explore the possible use of electronics to the telephone exchange . Experimental equipment that he built in 1934 gone into operation 5 years later, converting a portion of phoning exchange network into an electronic data processing system, using a huge number of vacuum tubes . [19] In the US, John Vincent Atanasoff along with Clifford E. Berry of Iowa State University developed and screened the -AtanasoffBerry Computer (ABC) in 1942, [29] the 1st "automatic electronic digital computer". [30] This design was in addition all-electronic and used about 300 vacuum tubes, with capacitors fixed in a very mechanically rotating drum for memory.