• describe laser printers
• describe the principal operation of laser printers
• state and explain briefly the components of inkjet printers
• state the two technologies used by the inkjet printers
• describe briefly the thermal bubble technology
• describe briefly the piezoelectric technology
• describe the principal operation of inkjet printers
• describe briefly the 3d printers
• explain the technologies used in 3d printers
• describe how the loudspeaker produces sound.
• state how a digitised sound stored in a file on a computer can be converted into sound
• in terms of speakers, define sampling rate
• describe microphones
• describe the internal operation of a microphone/ how microphone captures music
• state the use of a screen
• describe the OLEDs
• describe the screens of the OLEDs
• state the two technologies of touchscreens
• describe the internal operation of capacitive touchscreen.
• state the benefits and drawbacks of capacitive touchscreen