Computer Hardware

Write brief notes on the following. Use images for the devices described.

The computer system:

•      Types of computers: personal digital assistant (PDA), laptop, desktop computer, mainframe computer, supercomputer etc

•      Internal hardware parts of a computer; MAC address/ Motherboard/ Central processing unit (CPU), microprocessor, clock speed: for example, megahertz (MHz), gigahertz(GHz), terahertz (THz)/Primary storage: read-only memory (ROM), random-access memory (RAM)/Secondary storage: optical, magnetic, flash memory: for example, USB (universal serial bus) flash drive/

•      Measure of storage: Bit, byte, kilobyte (KB), megabyte (MB), gigabyte (GB), terabyte (TB), petabyte (PB), exabyte (EB),zettabyte (ZB), yottabyte (YB)/Character encoding: ASCII (Unicode and American Standard Code for Information Interchange)/Ports

Input and output devices

•      Input devices: Keyboards, mice, touch pads/ Optical mark recognition (OMR), optical character recognition (OCR), magnetic ink character recognition (MICR), radio frequency identification (RFID), radio tag, bar code scanners, magnetic stripe readers/Microphones/ Smart card readers/ Webcams, digital cameras/digital video cameras/Sensors, probes, real-time data collection/Composite devices: for example, game controllers/Touch-sensitive devices:

•      Output devices: Printers, monitors, speakers, projectors/CD-ROM (compact disc read-only memory), DVD (digital versatile/video disk) readers and burners.

     Some Resources for Reference
     http://www.authorstream.com/Presentation/MissBenjamin-112909-computer-hardware-introduction-input-output-devices-software-system-education-ppt-powerpoint/
 

    http://www.computerhope.com/jargon/i/inputdev.htm