The Z1 had 64-word memory and a clock speed of 1 Hz. Programming and output were both generated using punch tape with a specific reader.
1937 - October 19, 1973
is considered the first electronic digital computer and was the first machine to use vacuum tubes.Judge Earl R. Larson signed his conclusion that the ENIAC, patent by Eckert and Mauchly was invalid and named Atanasoff the inventor of the first electronic digital computer.
1943 - 1946
Short for Electronic Numerical Integrator and Calculator, the ENIAC was the first electronic computer used for general purposes, such as solving numerical problems.
May 9, 1949 - 1951
an early British computer considered to be the second stored program electronic computer. the first computer to run a graphical computer game, an implementation of tic-tac-toe named "OXO."
April 7, 1953
IBM's first electric computer and the first mass produced computer.The machine has 256 40-bit words of main memory and can perform 2,200 multiplications per second.
December 19, 1974 - 1975
included an Intel 8080 processor, "1024 word" memory boards with 256 bytes of memory. did not come with a keyboard, monitor, or printer and got its input from switches on the front of the computer.
weighed 55-pounds and had a five inch CRT display, tape drive, 1.9 MHz PALM processor, and 64 KB of RAM.
computer kit was developed by Steve Wozniak in 1976 and contained a 6502 8-bit processor and 4 kb of memory, which was expandable to 8 or 48 kb using expansion cards.