Fundamentals

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],[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 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]

Fundamentals

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Fundamentals