https://www.youtube.com/watch?v=KZusL76s9tk – Types of printers
https://www.youtube.com/watch?v=CFuNd3LqsIc Ink jet Printers
https://www.youtube.com/watch?v=WB0HnXcW8qQ – Laser Printer
https://www.youtube.com/watch?v=oQlceFYtzYQ – Laser Printer
https://www.youtube.com/watch?v=MDLM5fMFyA4 – Laser Printers
https://www.youtube.com/watch?v=YK_Ib6Io_aM – Amazing 3 D printers
https://www.youtube.com/watch?v=UCI7BgLrk-4 – how does it work
https://www.youtube.com/watch?v=5SWw_qM6_8I – 3d printers (replacing human face)