The cornea (aka lens).
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A CD-ROM ( Compact Disc- Read Only Memory ) is an Optical Type of Device. The reason of it being optical lies in the fact that its read/write head is optical in nature ( It uses a red colored light).
A camera, television, lap top, glasses, psp, claw machine.
generally ROUTERS are supposed to be the cop device for the networks. for more details read LEON-GARCIA.
Thermometer
1 example is an audio loudspeaker device because a coil and magnet is used to create the sound effect.