History Of Computer

Computer	Full Form	Year	Generation / Type	Inventor / Organization	Main Purpose	Main Component
Z1	(Model name)	1938	Mechanical / Pre-electronic	Konrad Zuse	First programmable mechanical computer	Mechanical parts
Z2	(Model name)	1939	Electromechanical	Konrad Zuse	Improved programmable calculator	Relays
Z3	(Model name)	1941	Electromechanical	Konrad Zuse	First working programmable automatic computer	Relays
Atanasoff–Berry Computer	ABC	1939–1942	Electronic Digital (Experimental)	John Vincent Atanasoff & Clifford Berry	Solve simultaneous linear equations	Vacuum tubes
Colossus	(Not an acronym)	1943	Electronic Digital	Tommy Flowers	WWII code breaking	Vacuum tubes
Harvard Mark I	Automatic Sequence Controlled Calculator	1944	Electromechanical	Howard Aiken with IBM	Scientific calculations	Relays
ENIAC	Electronic Numerical Integrator and Computer	1945	First Generation	John Mauchly & J. Presper Eckert	Military trajectory calculations	Vacuum tubes
Manchester Baby	Small Scale Experimental Machine	1948	First Generation	Frederic C. Williams & Tom Kilburn	First stored-program execution	Vacuum tubes
EDVAC	Electronic Discrete Variable Automatic Computer	1949	First Generation	John Mauchly & J. Presper Eckert	Stored-program architecture	Vacuum tubes
EDSAC	Electronic Delay Storage Automatic Calculator	1949	First Generation	Maurice Wilkes	Scientific research	Vacuum tubes
UNIVAC I	Universal Automatic Computer	1951	First Generation	J. Presper Eckert & John Mauchly	Commercial data processing	Vacuum tubes
LEO I	Lyons Electronic Office	1951	First Generation	J. Lyons and Co.	Business management	Vacuum tubes
IBM 701	(Model number)	1952	First Generation	IBM	Scientific computing	Vacuum tubes
IBM 650	(Model number)	1954	First Generation	IBM	Business and education	Vacuum tubes