Before revision: CCD readers (also known as LED scanners) Charge-coupled device (CCD) readers use an array of hundreds of tiny light sensors lined up in a row in the head of the reader.
After revision: CCD Barcode ScannerCCD readers (also known as LED scanners) Charge-coupled device (CCD) readers use an array of hundreds of tiny light sensors lined up in a row in the head of the reader.