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The Harvard Mark 1 computer.
The IBM Automatic Sequence Controlled Calculator (ASCC), called Mark I by Harvard University’s staff, was a general purpose electromechanical computer that was used in the war effort during the last part of World War II It was invented by Howard Aiken & Grace Hopper. -
ENIAC
ENIAC :- ( Electronic Numerical Integrator and Computer) was the first programmable, electronic, general-purpose digital computer made in 1945. It was Turing-complete and able to solve "a large class of numerical problems" through reprogramming. was invented by John Presper Eckert & John W. Mauchly. -
Manchester Baby
The Manchester Baby, also called the Small-Scale Experimental Machine (SSEM), was the first electronic stored-program computer. It was built at the University of Manchester by Frederic C. Williams, Tom Kilburn, and Geoff Tootill, and ran its first program on 21 June 1948. -
Transistor computer
A transistor computer, now often called a second generation computer, is a computer which uses discrete transistors instead of vacuum tubes.
was invented by John Bardeen, Walter Brattain & Wiliam Shockley -
UNIVAC
UNIVAC (Universal Automatic Computer) was a line of electronic digital stored-program computers starting with the products of the Eckert–Mauchly Computer Corporation. Was invented by : John Presper Eckert & John W. Mauchly