The correct answer is OCR.OCR is used to read a printed test.OCR stands for Optical Character Recognition.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 billboards in a landscape photo), or from subtitle text superimposed on an image (for example: from a television broadcast) Widely used as a form of data entry from printed paper data records “ whether passport documents, invoices, bank statements, computerized receipts, business cards, mail, printouts of static-dataIt is a common method of digitizing printed texts so that they can be electronically edited, searched, stored more compactly, and displayed on-lineOCR is a field of research in pattern recognition, Artificial intelligence, and computer vision.Additional InformationOptical Mark Reading (OMR) is a method of entering data into a computer system.Optical Mark Readers reads pencil or pen marks made in pre-defined positions on paper forms as responses to questions or tick list prompts. MICR (magnetic ink character recognition) is a technology used to verify the legitimacy or originality of paper documents, especially cheques.Special ink, which is sensitive to magnetic fields, is used in the printing of certain characters on the original documents.A cathode ray tube (CRT) is a specialized vacuum tube in which images are produced when an electron beam strikes a phosphorescent surface. Most desktop computer displays make use of CRTs.The CRT in a computer display is similar to the"picture tube" in a television receiver.