Early/First Generation Systems

• 1945 -- 1955
• Bare machines -- vaccum tubes and plugboards
  • Exemplified by ENIAC
  • Electronic Numerical Integrator And Computer
  • Designed by J.W.Mauchly and J.P.Eckertof the University of Pennsylvania in 1945
  • Commissioned by the Ballistics Research Lab (BRL) at the Aberdeen Proving Ground in Maryland
  • Made up of 18,000 vaccum tubes and 1,500 relays
• No operating system
• Black box concept -- human operators
• No protection