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2. Barcode reader - Wikipedia

   en.wikipedia.org/wiki/Barcode_reader

   Barcode reader. A stationary barcode scanner for a conveyor line. A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. [1] Like a flatbed scanner, it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals.

3. Magnetic ink character recognition - Wikipedia

   en.wikipedia.org/wiki/Magnetic_ink_character...

   Magnetic ink character recognition code, known in short as MICR code, is a character recognition technology used mainly by the banking industry to streamline the processing and clearance of cheques and other documents. MICR encoding, called the MICR line, is at the bottom of cheques and other vouchers and typically includes the document-type ...

4. Optical mark recognition - Wikipedia

   en.wikipedia.org/wiki/Optical_mark_recognition

   Optical mark recognition (OMR) is the scanning of paper to detect the presence or absence of a mark in a predetermined position. [5] Optical mark recognition has evolved from several other technologies. In the early 19th century and 20th century patents were given for machines that would aid the blind.

5. Researchers built a low-cost camera system that recreates ...

   www.engadget.com/optical-microphone-camera-laser...

   An algorithm compares speckle patterns captured by a rolling shutter and a global shutter. It uses the differences between the patterns to calculate the vibrations and recreate the audio.

6. mTiny robot review: Screen-free coding for kids - Engadget

   www.engadget.com/2019-11-17-mtiny-screen-free...

   To code the robot, the kids move the coding tiles in the order they want, starting with the green "go" flag and ending with the "stop" icon, then tap each one with the pen in the order they want ...

7. How gadgets could unlock the potential of lucid dreaming

   www.engadget.com/how-gadgets-could-unlock-the...

   There are many apps that also make bold claims about tipping you off that you’re dreaming. These might actually be a little more practical, for now. Awoken (Android) and Lucidity (iOS) for ...