When were bar code scanners invented?

A. 1940s

B. 1950s

C. 1970s

D. 1960s

Answer: Option C

Solution(By Examveda Team)

The first scanning of the now-ubiquitous Universal Product Code (UPC) barcode was on a pack of Wrigley Company chewing gum in June 1974 at a Marsh supermarket in Troy, Ohio, using scanner produced by Photographic Sciences Corporation. QR codes, a specific type of 2D barcode, have recently become very popular.