题目内容

_______ are used on smartphones and other small portable devices.

A. Mouse pointers
B. Ethernet ports
C. Virtual keyboards
D. Game controllers

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The mouse, game controllers, touch screens, and styluses are all types of _______ devices.

A. MIDI
B. ethernet
C. bus
D. pointing

Flatbed, document, and portable are types of _______ that accept documents and convert them into machine-readable form.

A. scanners
B. recognition devices
C. coprocessors
D. RFID readers

Supermarkets use _______ to scan codes printed on product containers.

A. photoelectric cells
B. bar code readers
C. OCR readers
D. RFID microchips

The most common card reader is the _______ card reader which reads encoded information stored on a thin magnetic strip located on the back of the card.

A. bar code
B. QR code
C. magnetic
D. OCR