They work by scanning the food or labels to scan it to bye the food... Ha
One can find police scanners when one goes to a store called Scanner Master. This store carries police scanners made by Uniden and Bearcat. Price varies by brand and model.
To explain how brain scanners work
Flatbed scanners work on almost the same principles as copiers.
How do lasers work
A cordless scanners works like how a cellphone or a regular cordless phone works. There are electrical signals that are connected between the scanners and the device you are using.
Keep track of merchandise
Yes if you have a usb cord
To the best of my knowledge, all regular scanners can work as a photo scanner. However, if you are into photography, a specifically designed photo scanner may be best for you.
Any scanners that are supported by SANE ("Scanner Access Now Easy") will work in Ubuntu. Note that you will need to add yourself to the "scanners" groupand log out and back in. A link in the "Related links" section below will show a list of supported models of scanner by manufacturer.
There are 3 types of scanners currently being sold on the market. These scanners are photo scanners, paper fed scanners, and hand held scanners.
Color scanners can be purchased at almost any store that sells electronics. Best Buy, Amazon, Office Max, Office Depot, and Staples all have a wide selection of color scanners.
"Yes there are several online stores that sell Digital Photo Scanners they include; Sears, Office Depot, Best Buy, PCrush, Epson, PC nation, and Buydig."