COMPUTER

• Computer system


  Consists of hardware components along with peripheral devices that work together
• Hardware


  The physical or tangible parts of the computer
• Keyboard Entry


  Any data inputted to the computer through a keyboard
• Keyboard


  • Probably the oldest and most common example of an input device that is designed around 101 to 104 alphanumeric keys
• Direct Entry


  Data that does not require to be keyed or pressed into a keyboard
• Pointing device


  Used to move the pointer or cursor on the screen by touching the mouse or by means of a stylus
• Mouse


  Uses a concentrated beam of a light or a tiny laser, called optical mice
• Touch screen


  A special type of monitor which allows you to click objects on the screen by touching the screen with your finger
• Glide pad


  Also known as a touch pad, this is a touch sensitive pad for controlling the cursor
• Scanning device


  Uses a scanner which is an electronic device that converts pictures or printed text into digital format
• Voice input device


  Also known as the speech or voice recognition system, through the use of microphone, the user can send audio signals to a computer
• Processing Device


  Any component in a computer that processes the input to produce an output
• System Unit


  All the other parts of a computer must be connected in one way or another to the CPU
• Internal parts


  • Located inside the System unit
• External parts


  • The parts outside the System unit
• CD-ROM Drive


  Where the compact disk is inserted
• LED


  Stands for Light Emitting Diode, is a Power Indicator in front of the system Unit
• Power Switch


  Used to turn the computer on and off
• Reset switch


  Used to restart the computer without turning it off
• USB Port


  Where the USB stick is inserted
• Ports


  Slots located at the back of the System Unit where cables are plugged
• Motherboard


  Also called the main board or system board, where the processor, add-in cards, and memory chips are located
• Central Processing Unit


  One of the important parts of a computer, also known as a microprocessor and acts as the brain of the computer
• Expansion slots


  Located on the motherboard and this is where expansion cards are inserted
• Video card


  An adapter used to process and display information for the monitor
• Power Supply Unit


  Actually special type of power transformer
• Monitor


  It is like a television or cathode ray tube (CRT) that displays data from your computer
• LCD projectors


  Displays the image on a wall-sized screen
• Smart board


  Similar to a touch screen that has a display screen which is a touch sensitive transparent panel covering the screen
• Examples of Print

  • Ink-jet
  • Laser
  • Dot matrix
  • Thermal print
• Speakers


  Produce the sound generated by the computer
• Primary Storage or Main memory


  The internal storage that holds data and instructions that the computer follows to perform commands
• Random Access Memory


  One of the key items that influences the overall performance of the computer, acts as a repository for data which can be directly accessed by the CPU
• Read-Only Memory


  Also known as non-volatile memory, is programmed with software called the Basic Input/Output medic System or Bios
• Secondary Storage or External Memory


  Refers to the different storage media on which a computer can store data and programs
• Hard Disk Drive


  Acts like a giant Floppy disk inside the System Unit
• Optical disk

  • Compact Disc (CD)
  • Digital Versatile Disc (DVD)
  • Blu-ray Disc (BD)
• Memory card or memory cartridge


  An electronic data storage device used for storing digital information, typically using flash memory
• USB flash drive


  Simply known as a VSB Drive or USb Stick, a data storage device that includes flash memory with an integrated UsB interface
• External hard drive


  A portable storage device that has a high storage capacity which can be used as a back-up computer