Answer:
Optical system. An overhead projector works on the same principle as a slide projector, in which a focusing lens projects light from an illuminated slide onto a projection screen where a real image is formed.
Explanation:
<span>The smallest network is a </span>personal area network,<span> which is a network of personal devices, such as the network you use when you sync your cell phone and your computer. </span>personal area network
It should be noted that the hardware component that keeps data and information when the device is not powered is called a storage device.
This device can be permanent or temporary storage device.
<h3>What is a storage device?</h3>
Storage device can be regarded as the device that store data.
There are different storage devices for the computer system, they includes;
- Optical Storage Devices.
- External HDDs
- Random Access Memory
- Flash memory devices.
- Floppy Disks.
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