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Fundamentals

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IT Fundamentals 1. INPUT Much conversion of language occurs in a computer system (English) DATA INPUT DEVICE (binary) CPU (binary) OUTPUT DEVICE INFO (English) Input/ Output
IT Fundamentals Two types of input : Data and Instructions
IT Fundamentals Input Devices ,[object Object],[object Object],[object Object],[object Object],Human data entry is called non-direct input. Machines make better input devices. DIRECT ENTRY , or SOURCE DATA AUTOMATION . Need to be: Accurate, reliable and easy to use, fast Human and keyboard is the most used input device
IT Fundamentals Examples of Direct Entry Input Devices - flat bed or hand-held - Similar to a photocopier - Reads page as a grid of dots - stores data as a "picture" MICR : Used with cheques Scanners
IT Fundamentals Examples of Direct Entry Input Devices Barcode Readers: Sit-in-the-Counter type - Reads standard or customised barcodes - Can also purchase software to print barcodes.
IT Fundamentals Input Types a. Data Collection Devices: Stocktake devices Automatic counters Web Cams Video camera whose output displays on a web page Digital Camera
IT Fundamentals Other Input Devices a. ,[object Object],[object Object],Pointing Devices Mouse
IT Fundamentals Other Input Devices TouchPad Pointing Stick Light Pen ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IT Fundamentals Voice Input ,[object Object],[object Object],[object Object]
IT Fundamentals Output Four common type of output are text, graphics, audio and video.
IT Fundamentals Output Output Devices Digital signals from computer are converted into human readable form. Hard Copy - printer - plotter Soft Copy - screen - voice Printers ,[object Object],[object Object],[object Object],[object Object],[object Object]
IT Fundamentals Output ,[object Object],[object Object],[object Object],[object Object],[object Object]
IT Fundamentals Output ,[object Object],[object Object],[object Object],[object Object],[object Object]
IT Fundamentals Output ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IT Fundamentals Output LCD Monitors ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IT Fundamentals Other Output Devices Data Projectors ,[object Object],[object Object],[object Object],[object Object]
IT Fundamentals SECONDARY STORAGE Control Unit works on programs/data in RAM POWER OFF ... RAM OFF Bye Bye Assignment However blocks of memory can be saved/read on secondary storage.
IT Fundamentals Secondary Storage Media and Devices Floppy Disks Hard Disks Tape and Tape drive Cartridge tape CD-ROM DVD ROM Magnetic-Optical drive PC Cards Smart Cards SECONDARY STORAGE
IT Fundamentals FLOPPY DISKS: ,[object Object],[object Object],[object Object]
IT Fundamentals Maintaining data stored on a disk ,[object Object],[object Object],[object Object],HARD DISKS
IT Fundamentals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Hard Disk Vs Floppy Disk
IT Fundamentals Optical Storage
IT Fundamentals Optical Storage
IT Fundamentals TAPE ,[object Object],[object Object]
IT Fundamentals OTHER TYPES OF STORAGE DEVICES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Fundamentals

  • 1. IT Fundamentals 1. INPUT Much conversion of language occurs in a computer system (English) DATA INPUT DEVICE (binary) CPU (binary) OUTPUT DEVICE INFO (English) Input/ Output
  • 2. IT Fundamentals Two types of input : Data and Instructions
  • 3.
  • 4. IT Fundamentals Examples of Direct Entry Input Devices - flat bed or hand-held - Similar to a photocopier - Reads page as a grid of dots - stores data as a "picture" MICR : Used with cheques Scanners
  • 5. IT Fundamentals Examples of Direct Entry Input Devices Barcode Readers: Sit-in-the-Counter type - Reads standard or customised barcodes - Can also purchase software to print barcodes.
  • 6. IT Fundamentals Input Types a. Data Collection Devices: Stocktake devices Automatic counters Web Cams Video camera whose output displays on a web page Digital Camera
  • 7.
  • 8.
  • 9.
  • 10. IT Fundamentals Output Four common type of output are text, graphics, audio and video.
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16.
  • 17. IT Fundamentals SECONDARY STORAGE Control Unit works on programs/data in RAM POWER OFF ... RAM OFF Bye Bye Assignment However blocks of memory can be saved/read on secondary storage.
  • 18. IT Fundamentals Secondary Storage Media and Devices Floppy Disks Hard Disks Tape and Tape drive Cartridge tape CD-ROM DVD ROM Magnetic-Optical drive PC Cards Smart Cards SECONDARY STORAGE
  • 19.
  • 20.
  • 21.
  • 24.
  • 25.