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Z1
The Z1 was a motor-driven mechanical computer designed by Konrad Zuse from 1936 to 1937, which he built in his parents' home from 1936 to 1938. It was a binary electrically driven mechanical calculator with limited programmability, reading instructions from punched celluloid film. -
ABC
Conceived in 1937, the machine was built by Iowa State College mathematics and physics professor John Vincent Atanasoff with the help of graduate student Clifford Berry. It was designed only to solve systems of linear equations and was successfully tested in 1942. -
ENIAC
The ENIAC was invented by J. Presper Eckert and John Mauchly at the University of Pennsylvania and began construction in 1943 and was not completed until 1946. It occupied about 1,800 square feet and used about 18,000 vacuum tubes, weighing almost 50 tons. -
UNIVAC
The UNIVAC I was the first general-purpose electronic digital computer design for business applications produced in the United States. It was designed principally by J. Presper Eckert and John Mauchly, the inventors of the ENIAC. -
NEAC-1101
The hardware utilized parametron devices invented by Goto Eiichi in 1954 and adopted a transformer-coupled system with a simplified winding structure, originally invented by NEC. This computer aimed at scientific computation and the first computer in Japan which adopted a floating-point arithmetic unit with seven decimal digits. -
PDP-1
The PDP-1 is the first computer in Digital Equipment Corporation's PDP series and was first produced in 1959. It is famous for being the computer most important in the creation of hacker culture at MIT, BBN, and elsewhere. -
TAC Digital Computer
TAC used 7,000 vacuum tubes and 3,000 diodes and was a binary serial computer with the EDSAC instruction set. For instructions, it used a 17-bit short word, and for numerical values a 35-bit long word. The main memory capacity was 1,024 short words. -
Altair 8800
In 1975, Ed Roberts coined the term personal computer when he introduced the Altair 8800. Although the first personal computer is considered to be the Ken back-1, which was first introduced for $750 in 1971. The computer relied on a series of switches for inputting data and output data by turning on and off a series of lights. -
Intel Creates a Microprocessor
Intel released the 80486 microprocessor and the i860 RISC/coprocessor chip, each of which contained more than 1 million transistors. The RISC microprocessor had 32-bit integer arithmetic and logic unit.
