Optical Character Recognition -- typically the art of teaching a computer to read printed text (provided as scanned images).

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Three principal open-source engines:

• GOCR (appears to have a Tcl/Tk frontend)
• Ocrad (GNU)
• Tesseract OCR (originally Hewlett-Packard, but now released as open source)

Recommended proprietary packages:

• Vividata OCR Shop XTR Lite
• VueScan

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