Introduction to Computers


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Introduction to Computers

  1. 1. Basic Hardware Introduction to Computer
  2. 2. <ul><li>What is a Computer ? </li></ul>
  3. 3. <ul><li>An electronic device that stores, retrieves, and processes data or which manipulates data according to a list of instructions and which is composed of hardware and software. </li></ul>Basic Definition
  4. 4. Characteristics of Computer <ul><li>Computers are popular because of following characteristics: </li></ul><ul><li>Speed: Computer can perform a task much faster than done manually. </li></ul><ul><li>Accuracy: Computer gives accurate results compared to task done manually. </li></ul><ul><li>Storage: Computer stores the information in its main memory and the same can be retrieved based on the requirement. </li></ul><ul><li>Multitasking: Computer performs multiple tasks simultaneously. For example, one can use the computer to take a printout of an inventory report and at the same time can use it to draft letters. </li></ul><ul><li>Communication: Computer can be used to exchange information between two or more computers. Internet is the best example of this. </li></ul>
  5. 5. Application Areas of Computers Business Area Entertainment Area Education Area Medicinal Area Finance Area
  6. 6. Basics of Computer Communication <ul><li>The term “communication” is defined as the act of transmitting, receiving ideas or exchanging information </li></ul>
  7. 7. Early Communication <ul><li>Telegraph and Radio Communication </li></ul>
  8. 8. The Language of Computers <ul><li>Computer being electronic machine it knows only “ON” or “OFF” (‘0’ or ‘1’). Any data that is to be fed, processed or stored should be converted into combination of 0s and 1s. This is called binary notation and 0 or 1 is called a Bit. </li></ul><ul><li>Bit is a basic memory unit. </li></ul><ul><li>Byte is unit of data consists of 8 bits </li></ul><ul><li>Kilo Byte (KB) equals 1024 – Bytes </li></ul><ul><li>Mega Byte (MB) equals 1024 Kilo Bytes </li></ul><ul><li>Giga Byte (GB) equals 1024 Mega Bytes </li></ul>
  9. 9. Data Transfer Inside a Computer <ul><li>Parallel and Serial Communication </li></ul>Serial Parallel 1 0 0 1 1 0 1 1 10011011 10011011 X Y 1 10011011 10011011 X Y 1 0 1 1 0 0 1
  10. 10. Basic Elements of Computer <ul><li>Hardware & Software </li></ul>Operating System Application Software
  11. 11. How Computer Works INPUT Control Unit STORAGE OUTPUT Arithmetic and Logical Unit
  12. 12. Components & Peripherals of Computer
  13. 13. Primary Components of Computer <ul><li>Motherboard </li></ul><ul><li>Processor </li></ul><ul><li>CPU Heat sink & Fan </li></ul><ul><li>RAM </li></ul><ul><li>Floppy Disk Drive </li></ul><ul><li>Hard disk </li></ul><ul><li>Optical Drive </li></ul><ul><li>SMPS </li></ul><ul><li>Port </li></ul><ul><li>Connector </li></ul><ul><li>Add on Cards - Modem, Network card, PCI Express Card etc. </li></ul>
  14. 14. Computer Peripherals <ul><li>Keyboard & Mouse </li></ul><ul><li>Printer </li></ul><ul><li>Scanner </li></ul><ul><li>Output devices Monitor (CRT/LCD) </li></ul><ul><li>Power Supply </li></ul><ul><li>Joystick </li></ul><ul><li>Microphone </li></ul><ul><li>Webcam </li></ul>
  15. 15. Summary <ul><li>A computer is an electronic machine that accepts input, processes it and produces the desired result. </li></ul><ul><li>A computer is characterized by speed, accuracy, storage, multitasking and communication. </li></ul><ul><li>Computers are used pre-dominantly in most of fields that include business, entertainment, education, medicine and financial organizations. </li></ul><ul><li>The term “communication” is defined as the act of giving, transmitting, or exchanging information . </li></ul><ul><li>The main form of communication between humans is through words. The human beings can express their thoughts both verbally and written. </li></ul><ul><li>Earlier people used items like lanterns, flags, mirrors and drum beats to send messages. </li></ul>
  16. 16. <ul><li>Thank you </li></ul>