When you sell retail products, it's convenient and efficient to use a barcode scanner. This scanner allows you to automatically transfer information about the product to your computer system so that ...
Nearly every barcode scanner I've run across is effectively a keyboard. I'd give it a try with one of the commonly available ones; worst case you can always return it.
If you plan to run a very small store, sometimes called a "mom and pop" shop, you can probably hand-enter pricing information when ringing up a customer's order. For a larger scale operation, however, ...