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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COMPUTER FUNDAMENTALS SECTION A PART ONE MULTIPLE CHOICES: 1. (b) Two types. 2. (b) 1 or more input signals to produce output. 3. (d) Both (a) and (c). 4. (b) Non-volatile. 5. (c) Direct-access storage device. 6. (c) Multiple object program files of any software. 7. (d) None of the above. 8. (b) way in which the network’s nodes are linked together. 9. (a) World wide web 10. (a) General purpose electronic equipment for homes. PART TWO 1. WRITE A SHORT NOTES ON “THE OSI MODEL”
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Computer Security Student Name University Abstract James works for a bank‚ and he spends most of his attending to bank clients and travelling. He always carries with him a laptop that contains confidential bank information. The Operating System of the laptop was last updated in May 2011. Some of the programs James uses are MS word 2007‚ MS Access and MS Excel. James’ computer is‚ however‚ not well secured. It does not have a firewall or an antivirus. In addition‚ the data in the laptop are
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Computer Packages 11 Graphic Packages: It is important to recall that the early graphics software performed creditably on production of simple bar graphs and funny little people made of squares. However‚ the modern day graphics software and hardware is so advanced such that it is sometimes difficult to tell if computer or trick photograph produced a picture. Computer graphics as often seen in advertisement‚ Logos‚ and sports broadcast on televisions are products of computer graphic applications
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A product that I have had experience purchasing is a computer. I bought it for attending college‚ but I have used it for so many other purposes. Today‚ having a computer has almost become a necessity; people use them for school‚ shopping‚ research‚ and communication. Many things that you may be on the lookout for‚ you can only find on the internet. Today‚ many people own a computer already and have no need to purchase another one. New discoveries in technology could be a factor in the change of supply
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HISTORY OF COMPUTER THE PRE-MECHANICAL AGE: 3000 B.C. – 1450 A.D. 1. Writing and Alphabets – Communication First development of signs corresponding to spoken sounds‚ instead of pictures‚ to express words. Around 2000 B.C.‚ Phoenicians created symbols that expressed single syllables and consonants (the first true alphabet) The Greeks later adopted the Phoenician alphabet and added vowels; the Romans gave the letters Latin names to create the alphabet we use today. 2. Paper
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Computer Technician “The first special-purpose electronic digital computer was constructed in 1939 by John V. Atanasoff‚ an American mathematician and physicist. In 1944‚ Howard Aiken‚ a Harvard University professor‚ built another digital computer‚ the Mark 1.” (The World Book) To become a Computer Technician one needs at least one or two years of technical training and have good math skills. Computer technicians manage everybody’s computer problems‚ from installing machines to networks in homes
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A computer system consists of mainly four basic units; namely input unit‚ storage unit‚ central processing unit and output unit. Central Processing unit further includes Arithmetic logic unit and control unit‚ as shown in the figure:. A computer performs five major operations or functions irrespective of its size and make. These are • it accepts data or instructions as input‚ • it stores data and instruction • it processes data as per the instructions‚ • it controls all operations inside a computer
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SEAFDEC Village‚ Tigbauan‚ Iloilo SYLLABUS IN COMPUTER 1 1st Grading Period 1. Definition of Computer‚ Uses of Computers‚ Things that a computer can and cannot do 2. History of Computers 3. Uses of computers in Different Places 4. Parts of a Computer 5. How a Computer Works 6. The Elements of Computer System 2nd Grading Period 1. How to Turn on and Turn Off a Computer 2. Caring for Your Computer 3. Definition of Operating System 4. Parts
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What are the Parts of Computer? The Parts of a Desktop Computer are: 1. System unit The system unit is the core of a computer system. Usually it’s a rectangular box placed on or underneath your desk. Inside this box are many electronic components that process information. The most important of these components is the central processing unit (CPU)‚ or microprocessor‚ which acts as the "brain" of your computer. Another component is random access memory (RAM)‚ which temporarily stores
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