https://en.wikipedia.org/wiki/Interlocking#Relay_interlocking http://relaysbc.sourceforge.net/circuits.html Relay latches and flip-flops Low relay count master-slave flip-flop http://relaysbc.sourceforge.net/rmslave.gif https://en.wikipedia.org/wiki/Z3_(computer) https://en.wikipedia.org/wiki/Konrad_Zuse https://en.wikipedia.org/wiki/Z1_(computer) https://www.bbc.com/news/business-53413931 Bo Ewald, chief executive,ColdQuanta,Colorado qubits Prof Andrew Daley at the University of Strathclyde Jonathan Pritchard weird phenomenon called entanglement French company Pasqal Christophe Jurczak, chairman, energy giant EDF https://en.wikipedia.org/wiki/Colossus_computer https://en.wikipedia.org/wiki/Atanasoff%E2%80%93Berry_computer https://en.wikipedia.org/wiki/ENIAC https://en.wikipedia.org/wiki/Manchester_Baby https://en.wikipedia.org/wiki/Manchester_Mark_1