The correct answer is: A. Laser scanner.
A laser scanner is a device that uses a laser beam to read a barcode. The laser beam is reflected off of the barcode and into a sensor, which converts the reflected light into an electrical signal. The electrical signal is then processed by a computer, which interprets the barcode and retrieves the associated data.
A wand is a handheld device that is used to scan barcodes. The wand emits a beam of light that is reflected off of the barcode and into a sensor. The sensor converts the reflected light into an electrical signal, which is then processed by a computer.
OCR stands for optical character recognition. OCR is a technology that is used to convert text that is printed or handwritten into digital text that can be processed by a computer.
MICR stands for magnetic ink character recognition. MICR is a technology that is used to read data that is encoded in magnetic ink. Magnetic ink is used on checks and other financial documents.
The correct answer is A. Laser scanner.