It used 5200 vacuum tubes.
Eniac didn't have any transistors. It was built with 17,468 vacuum tubes, 7,200 crystal diodes, and a whole host of other components. But no transistors. The first transistor was created in November, 1947, almost two years after Eniac was completed.
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at thebeginning of electronic technology the vacuum tube was used in electronic circuit. .but now a days semiconductors are used in electronic circuit
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ENIAC was the first digital general purpose computer, built in 1946, and with 17,468 vacuum tubes. The Illiac I, the first computer built and owned by a US educational institution, had 2800 vacuum tubes. The IBM 604 had about 2000 vacuum tubes.
Oh yes - and for several generations after that. ENIAC, the first mainframe computer, had to be kept in a room with very heavy air conditioning (about 60 degrees) because of the heat generated by all the vacuum tubes.
There have been many UNIVAC computers over the years, from the UNIVAC I to the Sperry UNIVAC 1100 series machines and beyond. Can you be more specific?
The ENIAC has 17,468 vacuum tubes. These tubes were the first technology that made computers function. Modern computers do not use this technology.
Integrated circuits (in many microprocessor integrated circuits) containing many billions of transistors each.
The Harvard Mark IV had about 4000 tubes.
The UNIVAC I (UNIVersal Automatic Computer I) was the first commercial computer produced in the United States. It was also the name of a business unit and division of the Remington Rand company formed by the 1950 purchase of the Eckert-Mauchly Computer Corporation.
Generally, they were called Vacuum Tubes. There were many different kinds and models, such as the Selectron, and Williams Tube. Their purpose was to store data by using a complex electro-magnetic electron transferral process. This allowed them to store very small amounts of data per tube. Since they were electrically driven, cutting the power on them would cause data loss- the computer had to be on 24/7. Later developments of the technology solved this problem. There were also non-tube based memories such as UNIVAC's Mercury Delay Line Memory, Piezoelectric crystal memory, magnetorestrictive coils, bubble memory, drum memory, twistor memory, and the most popular Core memory, or Magnetic Core memory.
There have been many UNIVAC computers over the years, from the UNIVAC I to the Sperry UNIVAC 1100 series machines and beyond. Can you be more specific?
None. The Harvard Mark 1 ASCC (IBM Automatic Sequence Controlled Calculator) was an electromechanical computer built for Harvard by IBM's Endicott NY facility in 1944. It was constructed from 765,000 components which included switches, relays, motors, rotating shafts, and clutches. It contained no vacuum tubes.The Harvard Mark III ADEC (Aiken Dahlgren Electronic Calculator) was the first computer to use vacuum tubes. It was built at Harvard in 1949 using 5000 vacuum tubes and 1500 crystal diodes, along with electromechanical components. The Harvard Mark IV, built in 1952, was the first fully electronic design.
vacuum tubes help us today with many things. the most important 1 is techology. If we didn't have vacuum tubes we wouldn't have computers. just thik of a life with out computers or t.v. vacuum tubes are also used in radios. so if vacuum tubes hadn't been invented we would not be able to use all the techology we use today.=]
The Atanasoff-Berry Computer (ABC) was conceived by John Vincent Atanasoff and built at Iowa State College by Atanasoff and Clifford Berry between 1939 and 1942. It contained 280 vacuum tubes and 31 thyratrons. The ABC was a purpose-built calculation machine designed to solve systems of linear equations. Since it was not programmable, it did not meet the formal definition of a "Turing-complete" computer later proposed by Alan Turing. While not actually a computer, the ABC was the first machine to represent numbers as binary digits; the first machine to perform calculations electronically, rather than mechanically; and the first to isolate computation from memory.