関連ワード:  is a barcode reader an input device    is a barcode reader an output device    magnetic stripe reader input device    is a barcode reader an input or output device    is optical mark reader an input device    is a barcode reader an input output or storage device    is a barcode reader a manual input device    is a optical mark reader an input or output device    is optical mark reader an output device    barcode reader is an input device true or false