OCR is an acronym of "Optical Character Recognition" or "Optical Character Reader". Recent some printers of fairly reasonable price, equip various ability including copying, telephone, facsimile, and furthermore scanner.
Scanners often provide an OCR survice. Using this facility recognized characters are usually printed out in NotePad application. For many decade of years this kind of trials have been intensively carried out, however most of them have many problems in accuracy.
If you can prepare an pdf (Portable Document File) using「Adobe Acrobat」reader, documents of fine text assist more ideal circumstances.