Why Is A Computer So Powerful?

Why Is A Computer So Powerful? A computer derives its power from its capability of performing the information processing cycle operations (input, process, output, and storage) with amazing speed, reliability, and accuracy; storing huge amounts of data and information; and communicating with other computers.  Speed In the system unit, operations occur through electronic circuits. When data, instructions, and information flow along these circuits, they travel at clo se to the speed of light. This allows billions of operations to be carried out in a single second.  Reliability The electronic components in modern computers are dependable because they have a low failure rate. The high reliability of the components enables the computer to pro duce consistent results. Accuracy Computers...

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System Unit & Storage Devices

System Unit The system unit, sometimes called a chassis, is a box-like case made from metal or plastic that protects the internal electronic components of the computer from damage (see Figure 1-3). The circuitry in the system unit usually is part of or is connected to a circuit board called the motherboard. Two main components on the motherboard are the central processing unit and memory. The central processing unit (CPU), also called a processor, is the electronic device that interprets and carries out the basic instructions that operate the computer. During processing, the processor places instructions to be executed and data needed by those instructions into memory. Memory is a temporary holding place for data and instructions. Both the processor and memory consist of chips. A chip is an...

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The Components Of A Computer

A computer consists of a variety of hardware components that work together with software to perform calculations, organize data, and communicate with other computers. These hardware components include input devices, output devices, a system unit, storage devices, and communications devices. Figure 1 -3 shows some common computer hardware components.  Input Devices An input device is any hardware component that allows a user to enter data and instructions into a computer. Six commonly used input devices are the keyboard, mouse, microphone, scanner, digital camera, and PC camera. A computer keyboard contains keys that allow you to type letters...

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Information Processing Cycle

Importance of Computer Computer is the key of IT world. First we’ll get an overall knowledge about the computer.  What Is A Computer? A computer is an electronic machine, operating under the control of instructions stored in its own memory that can accept data, manipulate the data according to specified rules, produce results, and store the results for future use.  Information Processing Cycle Input is any data or instructions you enter into a computer. Output is data that has been p rocessed into information. Computers process input (data) into output (information). Storage is an area in a computer that can hold data and information for future use. This series of input, process, output, and storage activities sometimes is called the information processing cycle. Most computers today...

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Why IT is being used?

Why IT is being used?You can’t think about a world with out IT today. IT has become part and participle with everybody’s life today. There are thousands of reasons about why people use computers to fulfill their requirements in many life aspects. Basically we can have Information Systems which is a major part in IT. Types Of Information Systems An information system is a set of hardware, software, data, people, and procedures that work together to pro duce information. A procedure is an instruction, or set of instructions, a user follows to accomplish an activity. An information system supports daily, short- term, and long -range activities of users in a company. Information systems generally fall into one of five categories: office information systems, transaction processing systems, management...

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What is Information Technology?

IT (information technology) is a term that encompasses all forms of technology used to create, store, exchange, and use information in its various forms (business data, voice conversations, still image s, motion pictures, multimedia presentations, and other forms, including those not yet conceived). It's a convenient term for including both telephony and computer technology in the same word. It is the technology that is driving what has often been called "the information revolutio...

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Data and Information

Data and InformationData is a collection of raw unprocessed facts, figures, and symbols. Computers process data to create information. Information is data that is organized, meaningful, and useful. Computer processes several data items to produce a paycheck. Another example of information is a grade report, which is generated from data items such as a student name, course names, and course grades. A user is someone who communicates with a computer or uses the information it generate s. Hardware is the electric, electronic, and mechanical equipment that makes up a computer. Software is the series of instructions that tells the hardware how to per form tasks. Without software, most hardware is useless. The hardware needs instructions from software to process data into information. Data (1)...

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"සිංහලයා මෝඩයා, කැවුම් කන්න යෝදයා"

"සිංහලයා මෝඩයා, කැවුම් කන්න යෝදයා" මේ පද පේලිය ඔයාලටත් නිතර ඇහිල තියෙනවාට කිසිම සැකයක් නැහැ... මේ ඒ ගැන ඔයාලගෙ දැනුමට යමක් එකතු කරන්න ගත්තු පුංචි උත්සාහයක්.. " දෙවන රාජසිංහ රජතුමාගෙ කාලෙ ලන්දේසි එක්ක යුද්ද කරනකොට.... ලන්දේසින් අතින් මැරිල වැටිච්චි අපේ සිංහල සොල්දාදුවො හැම කෙනෙකුගෙම වගේ කරේ කැවුම් මල්ලක් තිබිල තියෙනව.." සටනින් මැරී වැටිච්චි ඒ වීර සිංහල සොල්දදුවන්ගෙ මිනී දිහා බලං උන්නු ලන්දේසිකාරයො අවඥාවෙන් හිනාවෙලා "සිංහලයා මෝඩයා කැවුම් කන්න යෝදයා.." කියල කිව්වලු.. ඒ වගේ "සිංහලයා මෝඩයා කැවුම් කන්න යෝදයා.." කියන කියමන අපේ ම සිංහල බැලයන් ලවාම සමාජගත කරන්නට පරදේසක්කාරයො එදා ඉඳලම කටයුතු කලා.. ඒක කලේ ශ්‍රේෂ්ඨ ජාතියක් වෙච්චි සිංහල මිනිස්සුන්ට අවමන් කරන්න කියන එක තේරුම් අරන් ඉන්නෙත් අද ඉන්න කීයෙන් කී දෙනා ද? "සිංහලයා යනු මෝඩයෙකි" කියන මානසිකත්වය සිංහලයන් අතරෙ ව්‍යාප්ත කරන්නට එදා උන්නු...

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"ඔන්න ගෝනි බිල්ලො එනව..."

ඔයාල අහල තියෙනව නේද පුංචි කාලෙ අපේ වැඩිහිටියො අපිව බය කරන්න නිතරම කියන, "ඔන්න බිල්ලො එනව..." "ඔන්න ගෝනි බිල්ලො එනව..."     වාගෙ යෙදුම්.... ඉතිං මේ පුංචි "සපෝර්ට්" එක බිල්ලො කියන්නෙ කව්ද? කොහොමද මේ වචනෙ අපේ භාෂාවට එකතු උනේ කියල ඔයාලට හරියටම දැන ගන්ඩත් එක්කල.. ගජබාහු හෙවත් ගජබා රජ්ජුරුවො ගැන අහල ඇතිනේ..? අර යගදාව මිරිකල වතුර ගත්තේ?? අන්න එ' උත්තමයගෙ තාත්ත, එ' කියන්නෙ පිය රජතුමා වෙච්චි වංකනාසිකතිස්ස රජතුමාගෙ කාලෙ දැවැන්ත සොළී හමුදාවක් මේ රට ආක්‍රමණය කරල 12000ක් වු අපේ ශක්තිමත් සිංහල කොල්ලො වහල් සේවය සඳහා සොළී රටට බලහත්කාරයෙන් ගෙන ගිය කතාව දන්නව ඇතිනෙ නේද? ඉතිං එ' කාලෙ ලක්දිව කරක් ගහපු සොළී කණ්ඩායම් ගමක් නගරයක් ගානෙ ගිහින්, අළු භාජනයකුත් අරගෙන ගිහින්, ශක්තිමත්, කඩවසම් සිංහල ගැටයෙක් දැක්කම, අළු අහුරක් අරන් අර හාදයගෙ ඇස් අරින්නවත් බැරි වෙන විදිහට මූනට ගහනවලු... පස්සෙ "ගෝනියක දාගෙන...

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