Computers and those professionals that maintain, troubleshoot, program, administer, community, and build them are central to most every trade. Called the Mannequin K” Adder as a result of he built it on his Kitchen” desk, this simple demonstration circuit provides proof of idea for applying Boolean logic to the design of computers, leading to building of the relay-primarily based Model I Complicated Calculator in 1939. That same 12 months in Germany, engineer Konrad Zuse built his Z2 computer, additionally utilizing phone company relays.