関連ワード:  barcode reader is an input device    barcode reader is an input device true or false    barcode reader is an input device or not    barcode reader is an output device    barcode reader is an output device true or false    barcode scanner is an input device    explain barcode reader is an input device    barcode scanner is an output device    barcode reader is an input or output device    barcode reader is an example of input device