Cool vids. well, at least for me. first time i've seen it...
Hard disk
http://www.engr.colostate.edu/~dga/video_demos/controls/CSU_Controls_Lab/computer_hard-drive.wmv
Inkjet Printer
http://www.engr.colostate.edu/~dga/video_demos/mechatronics/inkjet_printer_components.wmv
Hard disk
http://www.engr.colostate.edu/~dga/video_demos/controls/CSU_Controls_Lab/computer_hard-drive.wmv
Inkjet Printer
http://www.engr.colostate.edu/~dga/video_demos/mechatronics/inkjet_printer_components.wmv