What are the technologies used behind the barcode or scanners?

which technology is particularly used in barcode wand reader and barcode slot reader
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READER SERVICE CARD Labeling Software For Dot Matrix or LaserJet Bar Code Readers for PC, XT, AT, PS2, Mac and RS-232 Tenninals Portable Bar Code Readers

The banking industry needed to automate check handling and were evaluating pre-printed machine readable data entry But IBMs proposed barcode

which lottery is best in india Other scanner types used over the decades include omnidirectional bar code laser high-speed scanners, video camera readers, down to miniature (

which slot machines have the best odds The bar code reader sends the waveform to the decoder, which decodes the waveform and sends it to the computer in a traditional data format Laser bar code