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Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was used to print the document.
The 1974 "Washington Nat'l League" cards are considered errors too, but were corrected during the run. This came about when there was a strong possibility that the San Diego Padres might move to Washington after the 1973 season.
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Main page; Contents; Current events; Random article; About Wikipedia; Contact us
Main page; Contents; Current events; Random article; About Wikipedia; Contact us
Video of the process of scanning and real-time optical character recognition (OCR) with a portable scanner. Optical character recognition or optical character reader (OCR) is the electronic or mechanical conversion of images of typed, handwritten or printed text into machine-encoded text, whether from a scanned document, a photo of a document, a scene photo (for example the text on signs and ...
The Advanced Facer Canceller System (AFCS) is an electro-mechanical mail handling system. A high-speed machine used by the US Postal Service to cull, face, and cancel letter mail through a series of automated operations.
The characters are read by a MICR reader head, a device similar to the playback head of a tape recorder. As each character passes over the head, it produces a unique waveform that can be easily identified by the system. MICR readers are the primary tool for cheque sorting and are used across the cheque distribution network at multiple stages.