computer system

computer system

1. input devices

   • usb port
   • keyboard
   • joystick
   • mouse
   • touch pad
   • tracker ball
   • barcode reader
   • light pen
   • laser
   • laptop
     • mouse
     • keyboard
   • iphone
     • microphone
     • touch screen
     • biometric devices

2. output

   • speakers
   • headphones
   • scanner
   • OMR
   • printer
   • digital projector
   • tablet
   • graphics
   • inkjet printer
   • plotters
   • monitor screen
   • laptop
     • monitor
     • printer
     • speakers
     • lights

3. gates

   • logic gates can be represented using the following symbols

4. chapter 2

   • "BIT"
     • bit means (binary digits)
   • how does a computer store data?
     • a computer stores data on the "BITS" / binary digits, either ON or OFF (1 or 0 respectively)
   • RAM

5. 8 princeples of data protection act

   • personal data shall be processed fairly and lawfully, shall not be processed unless
   • personal data shall be obtained only for one or two specifed and lawful purposes
   • personal data shall be accurate and where necessary,kept up to date
   • personal data processed shall not be kept for longer than is necessary

6. numbers in python

   • + = addition
   • - = subtraction
   • * = multiplication
   • / = division

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