Automatic Digital Computers

accumulator adding circuit addition algebra amplifier Analytical Engine applied arithmetic unit automatic auxiliary store Babbage binary digits binary number Boolean algebra calculating machine cards carry digit cathode-ray tube checking clock pulses column computing machine connexion constructed contain conversion routine core counter decimal digits described devices diagram digital computer diode EDSAC EDVAC electronic enable Engine ENIAC error example flip-flop function digits gate given gramme Harvard Mark II high-speed store initial input routine large number logical design magnetic drum magnetic tape master routine matrix method minor cycle multiplicand multiplier necessary number standing obtained operation order code output passed performed possible printed programme pulse interval punched punched tape recording relay represent result Sequence Controlled serial shifting shown in Fig signal significant digits similar speed storage location subroutine subtraction synchronizing tank teleprinter tion transfer tube two-out-of-five code values valves waveform winding wire zero