_______ is a reading device that reads printed text by scanning it character by character.

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**Solution:**

1. An **Optical Character Reader (OCR)** is a device that scans printed or handwritten text character by character.

2. It converts the scanned images of text into machine-readable digital text.

3. Other options like Track Ball, Digitizer, and MICR serve different purposes:
   - Track Ball: A pointing input device.
   - Digitizer: Converts analog information into digital form, often for graphics.
   - MICR: Reads magnetic ink characters, mainly used in banking.

4. Therefore, the correct answer is **Optical Character Reader (OCR)** as it specifically reads printed text by scanning character by character.

**Answer:** Optical Character Reader (OCR)

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