TLE 7 LESS 2 (4TH)

• Computer


  An electronic device that performs tasks based on instructions given by the user
• Computer system works


  1. Data entered by user

  2. Computer processes data

  3. Computer produces output
• Elements of a computer system

  • Peopleware
  • Hardware
  • Software
• Peopleware


  The user of the computer itself
• Hardware


  Tangible or physical part that performs the various tasks of the computer
• Software


  A set of programs, procedures, and routines that tells the computer what to do
• Components of computer hardware

  • Input devices
  • Processing devices
  • Output devices
• Input devices


  Used to enter data such as text, image or pictures, audio or sounds, and video
• Keyboard


  An input device used to enter characters and functions into the computer system by pressing buttons, or keys. It is the primary device used to enter text.
• Mouse


  An input device used to point and select objects on the computer monitor
• Scanner


  Used to capture a source document and converts printed data or images into an electronic data format
• Web camera


  An input device most often used to enable people to see each other when communicating over the internet, or for recording video blogs, or other videos
• Microphone


  Used to input sound that is then stored in a digital form. It is used for various applications such as adding sound to a multimedia presentation or for mixing music
• Output Devices


  • Monitor
  • Printer
  • Speaker/Headset
• Output Devices


  Used to display and alter data into the computer
• Monitor


  • An electronic visual computer display that includes a screen, circuitry, and the case in which that circuitry is enclosed
• Printer


  • A device used to print texts and pictures
• Speaker/Headset


  • An output hardware device that produces sound
• Projector


  An output device that projects an image onto a large surface, such as a white screen or wall
• Processing Devices


  Responsible for all primary functions of data management. The processor requires components that support it with the management of data to operate
• Motherboard / Mainboard / System Board


  • The main circuit board of a computer. It contains all the circuits and components that run the computer
• CPU (Central Processing Unit)


  The processor is the main "brain" or "heart" of a computer system. It performs all of the instructions and calculations that are needed and manages the flow of information through a computer
• RAM (Random Access Memory)


  Volatile, meaning it holds data only when the power is on. When the power is off, RAM's contents are lost
• Video Card/GPU (Graphics Processing Unit)


  Also called a display card, graphics card, display adapter, or graphics adapter. An expansion card which generates a feed of output images to a display device (such as a computer monitor)