question_answer

______ are printed lines on most products.

A)  Stripes   

B)  Scanner

C)  Barcodes         

D)  GUIs 

E)  None of these

Correct Answer: C

Solution :

[c] A barcode is an optical machine-readable representation of data relating to the object to which it is attached. They are used to automate supermarket checkout systems, a task for which they have become almost universal. Their use has spread to many other tasks that are generically referred to as automatic identification and data capture (AIDC).