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The history of the development of computers
The history of the development of computers
Later development of computers
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History of the Computer
The ENIAC (Electronic Numerical Integrator and Computer) was the first large-scale, computer. The ENIAC was built for the military to calculate the paths of artillery shells. Later on it was used to make calculation for nuclear weapons research, weather predictions, and wind tunnel design. “The ENIAC was brought in to use inn February of 1946 and was used unit October 1955” (Encarta).
The creators of the ENIAC were American physicist John W. Mauchly and American Electrical engineer John Persper Eckert, Jr. at Moore School of Electrical Engineering at the University of Pennsylvania. Eckert and Mauchly demonstrated the ENIAC less than three years after the Army commissioned its construction. In 1947 the ENIAC moved from the University of Pennsylvania to its permanent home at the Aberdeen Proving ground in Maryland. “Only one system of its type was ever built, but operated continuously until October 1955” (Encarta).
The ENIAC was very different than modern day computers, which use microprocessors composed of thousands or millions of transistors; the ENIAC used vacuum tubes to process data. It had approximately 18,000 vacuum tubes, which were about the size of a small light bulb. The ENIAC was composed of 30 separate units with power supplies and cooling units; all together the whole unit weighed more than 30 tons, and took up 1800 sq. ft. and consumed 175Kw of power.
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The ENIAC could perform about 5000 calculations per second, more than 10,000 times slower that most modern day computers. The ENIAC took about 20 seconds to calculate problems that took humans two to three days to do manually. Initially, scientists programmed and entered data into ENIAC by manually setting switches and rewiring the machine. Later a more efficient IBM punch-card reading machine was used to input data, while another IBM punch card machine was used to store data. When the ENIAC completed a calculation, it would notify operators by turning on a sequence of lights or punching certain sequences of cards.
The ENIAC was designed to calculate continuously all day and all night. However its circuitry and vast number of vacuum tubes tended to burn out, the ENIAC was continuously down to be serviced, which caused the ENIAC to be down one third of the that is could be working. As soon as Eckert and Mauchly completed the ENIAC’s design, the signed a contract to build a successor, which was called the EDVAC (Electronic Discrete Variable Automatic Computer), this more efficient design reduced the number of vacuum tubes down to only 4000.
6. web site: women in science/ women in computer science/ women involved in ENIAC program.
Inventing the ENIAC was a long and tedious process. The idea of creating a thing like the ENIAC came up in 1939, when John Mauchly and John Atanasoff met together to discuss it. It wasn't until 1942 when the blueprints were made by Mauchly and his new accomplice, J. Presper Eckert. Later that year the US government funded project ENIAC, with a budget of $500,000 (penn). Not much information of ENIAC was recorded from the process. The massive computer was not given coolers until 1945, when it caught fire. Finally, on February 14, 1946, it was announced to the public. The ENIAC did not get its rightful recognition until 1996, on the fiftieth anniversary. The entire process took about 5 years, and at the end they didn't even get proper respect for it.
In previous years, the first computers were mechanical, not electronic. One of the first computers ever made was the Difference Engine, designed by Charles Babbage. (Babbage, C, n.d.). The Difference Engine was able to calculate polynomials using the differences method. After the Difference Engine, Babbage began his work on an improved calculating engine, the Analytical Engine. The Analytical Engine used punch cards to operate, just like the Jacquard Loom. The Jacquard Loom used punch cards to control weaving that created interesting patterns in textiles. The punch cards were used in the Analytical Engine to define the input and the calculations to carry-out. The Analytical Engine had two major parts. The first part was the mill, which is similar to a modern day computer processing unit, or a CPU. The CPU is the brain of a modern day computer; it is what carries out modern day instructions inside a computer. The mill would execute what it received from the store. The second part was the store, which was the memory of the computer. “It was the world’s first general-purpose computer.” (Babbage, C, n.d.)....
His work at the Pearl Street generating station allowed the residents of lower Manhattan to receive a constant 110 volts of electricity in their houses. Four years later, Edison remarried. His new wife was almost twenty years younger than him. A year later, he built an industrial research laboratory in West Orange, New Jersey which was the primary research laboratory for the Edison Illuminating Company. During that time, he also upgraded his phonograph, which was now capable of recording sound on wax cylinders.
In the fifties, computers were in the experimental stage they were extremely hard to work with, and were a constant technicians worst nightmare, because often enough you had to replace the fuses (s Appendix a).
In 500 B.C. the abacus was first used by the Babylonians as an aid to simple arithmetic. In 1623 Wihelm Schickard (1592 - 1635) invented a "Calculating Clock". This mechanical machine could add and subtract up to 6 digit numbers, and warned of an overflow by ringing a bell. J. H. Mueller comes up with the idea of the "difference engine", in 1786. This calculator could tabulate values of a polynomial. Muellers attempt to raise funds fails and the project was forgotten. Scheutz and his son Edward produced a 3rd order difference engine with a printer in 1843 and their government agreed to fund their next project.
...) - “John W. Mauchly and the Development of the ENIAC Computer.” Penn Library Exhibitions. http://www.library.upenn.edu/exhibits/rbm/maucly/jwm6.html
Mark I. It was actually a electromechanical calculation. It is said that this was the first potentially computers. In 1951 Remington Rand’s came out with the UNIVAC it began
Computer engineering started about 5,000 years ago in China when they invented the abacus. The abacus is a manual calculator in which you move beads back and forth on rods to add or subtract. Other inventors of simple computers include Blaise Pascal who came up with the arithmetic machine for his father’s work. Also Charles Babbage produced the Analytical Engine, which combined math calculations from one problem and applied it to solve other complex problems. The Analytical Engine is similar to today’s computers.
The fist computer, known as the abacus, was made of wood and parallel wires on which beads were strung. Arithmetic operations were performed when the beads were moved along the wire according to “programming” rules that had to be memorized by the user (Soma, 14). The second earliest computer, invented by Blaise Pascal in 1694, was a “digital calculating machine.” Pascal designed this first known digital computer to help his father, who was a tax collector. Pascal’s computer could only add numbers, and they had to be entered by turning dials (Soma, 32). It required a manual process like its ancestor, the abacus. Automation was introduced in the early 1800’s by a mathematics professor named Charles Babbage. He created an automatic calculation machine that was steam powered and stored up to 1000 50-digit numbers. Unlike its two earliest ancestors, Babbage’s invention was able to perform various operations. It relied on cards with holes punched in them, which are called “punch cards.” These cards carried out the programming and storing operations for the machine. Unluckily, Babbage’s creation flopped due to the lack of mechanical precision and the lack of demand for the product (Soma, 46). The machine could not operate efficiently because technology was t adequate to make the machine operate efficiently Computer interest dwindled for many years, and it wasn’t until the mid-1800’s that people became interested in them once again.
The Whirlwind computer had a video display that was controlled interactively by a light gun. The display attracted users much more than computer code. The Whirlwind computer became the basis for SAGE (Semi-Automatic Ground Environment), a defense command-and-control system developed for the Air force. In the 1960s Ivan Sutherland’s MIT doctoral thesis introduced a Sketchpad interactive drawing system, which established the theoretical groundwork for computer graphics software (Machover 14). In the mid-1960s, computer graphics was booming in private industry. General Motors had released DAC-1 a computer-aided design system, and Itek developed the Digigraphics electronic drafting machine. By the late 1960s the first storage-tube display terminals appeared, shortly followed by direct-view storage tube display terminals (DVST) which cost thousands of dollars; however this was an improvement to the tens to hundreds of thousands spent initially for display systems. In the 1970s Turnkey systems emerged, beforehand users had to develop software to make their hardware work however turnkey systems provided a haven to users from software issues. Bit-mapped raster displays developed as memory...
The next big step in computer technology was the building of ENIAC. The first successful, general digital computer was finished in 1945 and weighed 60000 lbs. and housed more than 18000 vacuum tubes. This computer could not permanently store information however so a new development had to be made and in 1952 EDVAC was born. Now machines could “remember” information. Technologically, this was a huge advancement but could the developers see what might come of the future if a computer can remember what it has done? But walking talking computers that could think and speak on their own were a far cry considering these machines covered more than an acre in size.
“In 1946, John Mauchly and J Presper Eckert developed the fastest computer at that time, the ENIAC I. It was built under the assistance of the US army, and it was used on military researches. The ENIAC I contained 17468 vacuum tubes, along with 70000 resistors, 10000 capacitors, 1500 relays, 6000 manual switches and 5 million soldered joints. It covered 1800 square feet of floor space, weighed 3 tons, consumed 160 kilowatts of electrical power.”(Bellis, Inventors of Modern Computer)
The history of the computer dates back all the way to the prehistoric times. The first step towards the development of the computer, the abacus, was developed in Babylonia in 500 B.C. and functioned as a simple counting tool. It was not until thousands of years later that the first calculator was produced. In 1623, the first mechanical calculator was invented by Wilhelm Schikard, the “Calculating Clock,” as it was often referred to as, “performed it’s operations by wheels, which worked similar to a car’s odometer” (Evolution, 1). Still, there had not yet been anything invented that could even be characterized as a computer. Finally, in 1625 the slide rule was created becoming “the first analog computer of the modern ages” (Evolution, 1). One of the biggest breakthroughs came from by Blaise Pascal in 1642, who invented a mechanical calculator whose main function was adding and subtracting numbers. Years later, Gottfried Leibnez improved Pascal’s model by allowing it to also perform such operations as multiplying, dividing, taking the square root.
During the World War, the U.S. military had a high demand for fast computers which could perform weather predictions in minutes and extremely complex calculations. This was when the ENIAC was built. The ENIAC stands for Electronic Numerical Integrator And Computer, a partnership between the University of Pennsylvania and the U.S. government. Right after the landmark "Von Neumann Architecture" was introduced it considerably increased the speed of the computer since it was used only in one memory. The Electronic Discrete Variable Automatic Computer (EDVAC) and UNIVAC were built based on this architecture using vacuum tubes.