ICT in Todays World

ICT in Todays World

1. Input devices - Components to allow users to enter data such as instructions

   • Processor - Component for deciding what the instructions mean and what to do – this is the processing of the instructions or data
   • Output devices - Components for showing the results of the processing to the user data such as instructions
   • Internal or main memory - Components to store the data and/or instructions that are about to be, are being, or have been, processed
   • Backing storage - Components to store the data and/or instructions when the computer is switched off so the computer system or a user can come back to them later

2. Input Entering data into a computer system is input.

   • Processing Data is converted it from one form to another. This is done by following a set of instructions and commands.
   • Output When the results of processing are shown, this is output.
   • Storage Data is kept or recorded while waiting to be used or for future use

3. Network - When computers are connected together so that they can share data and devices such as printers, they are said to be in a computer network.

   • Interface - This is where data is transferred between computer devices or between people and computers.
   • USB interface - The Universal Serial Bus interface was designed for use on personal computers to connect peripheral devices such as printers, keyboards and flash drives.
   • Peripheral device Any device that is not actually part of the computer but is attached to a computer is called a peripheral device. Peripheral devices are seen as expanding the system and include scanners and printers.

4. Mouse - Choosing options from an on-screen menu and selecting icons

   • Keyboard - Entering characters when typing a letter
   • Joystick/game controller Moving on-screen objects in a computer game CPU
   • Scanner Importing a printed image into a computer system
   • Barcode reader Reading the data stored in a barcode
   • Chip and PIN reader Reading the data stored in a chip on a bank or ID card
   • Magnetic stripe reader Reading the data stored in a magnetic stripe on a bank or ID card
   • Keypad Entering numbers at a supermarket checkout