The History of Computers Whether you know it or not you depend on computers for almost every thing you do in modern day life. From the second you get up in the morning to the second you go to sleep computer are tied into what you do and use in some way. It is tied in to you life in the most obvious and obscure ways. Take for example you wake up in the morning usually to a digital alarm clock. You start you car it uses computers the second you turn the key (General Motors is the largest buyers
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History of Computer Introduction Man’s progress is measured by sophistication of his tools. First‚ he discovered how to control fire. Eventually‚ he invented the wheel. He built boats and earned to harness the wind. As soon as commerce developed in the early societies‚ people recognized the need to calculate and keep track of information. They soon devised simple computing devices and bookkeeping systems to enable them to add‚ subtract‚ and simple record transactions. Today‚ we are witnessing
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HISTORY OF COMPUTER Abacus - The First man-made computing device. - It can perform addition and subtraction - invented in China Pascal’s calculating machine/Pascaline - The first mechanical calculator - Invented by Blaise Pascal - Can perform addition & subtraction Leibnitz calculator - First general-purpose calculating machine - Extended version of Pascal Calculating machine - Can perform multiplication and Division - Invented by Gottfried Leibnitz Automatic
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HISTORY OF COMPUTERS The abacus was an early aid for mathematical computations. Its only value is that it aids the memory of the human performing the calculation. A skilled abacus operator can work on addition and subtraction problems at the speed of a person equipped with a hand calculator. The abacus is often wrongly attributed to China. In fact‚ the oldest surviving abacus was used in 300 B.C. by the Babylonians. The abacus is still in use today‚ principally in the far east. A modern abacus
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HISTORY OF COMPUTERS Ancient era Suanpan (the number represented on this abacus is 6‚302‚715‚408) Devices have been used to aid computation for thousands of years‚ mostly using one-to-one correspondence with fingers. The earliest counting device was probably a form of tally stick. Later record keeping aids throughout the Fertile Crescent included calculi (clay spheres‚ cones‚ etc.) which represented counts of items‚ probably livestock or grains‚ sealed in hollow unbaked clay containers.[1][2]
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Date | Event | c. 2400 BC | The abacus - the first known calculator‚ was probably invented by the Babylonians as an aid to simple arithmetic around this time period. This laid the foundations for positional notation and later computing developments. | 1300 | Ramon Llull invented the Lullian Circle: a notional machine for calculating answers to philosophical questions (in this case‚ to do with Christianity) via logical combinatorics. This idea was taken up by Leibniz centuries later‚ and is thus
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1944(Destroyed) Cost: $6500 Size: Two 6’ x 3’ x1’ Memory racks Technology: Relays Memory : 64 22-bit floating point words Program: 35mm punched film Speed : 0.5 Operations per second Application: Circuit Analysis‚ defense‚ prototype Atanasoff-Berry Computer(ABC) Inventor : John V. Atanasoff Builder : Atanasoff and Berry Operational : 1942 Cost : $ 7000 Size : 6’ x 3’ x 3’ Technology : Tubes‚ capacitors‚ cards Memory : 64 50-bit words Program : Fixed‚ Matrix arithmetic calculator Speed : 32
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role‚ the media and individual journalists experienced all forms of vicissitudes and punishment by the colonial authorities. The origins of the media however predated the nationalist struggle for independence. Without recourse to a repeat of long history here‚ we acknowledge the fact that the Nigerian press is a product of evolution from the early Christian missionary establishment in the South of the country. Between 1842 and 1885‚ the Church Missionary Society‚ the Baptist‚ Methodist and the Catholic
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technique in a format that utilizes continuous signals to transmit data including voice‚ image‚ video‚ electrons etc. An analog signal is a variable signal continuous in both time and amplitude which is generally carried by use of modulation. 2. History of Analog Communication – 3. Amplitude Modulation - Amplitude modulation (AM) is a modulation technique used in electronic communication‚ most commonly for transmitting information via a radio carrier wave. AM works by varying the strength (amplitude)
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addictive. If you have problems getting off of these sites‚ just have someone else block these sites using your built in Content Advisor or if you are using Windows Vista‚ use the parental controls to control internet access and time on computer. Try using the computer at the library. You won’t be as tempted to look at certain websites (such as porn‚ etc.)and they do have a limit on how long you can stay online. Also‚ the library is a good place to get some good books and magazines to read‚ so you won’t
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