HARDWARE -
For Sales Used by Shops

An OPTICAL MARK READER (OMR) read marks made by pencil on a printed form into the computer.

Barcodes are on every product you buy and are unique to each product.

Magnetic stripe is built into plastic cards such as credit and debit cards.
They are read by a MAGNETIC STRIPE READER.

Magnetic ink characters are read by MAGNETIC INK CHARACTER READERS (MICR).

A special font is used to make it easy for the reader to discriminate the characters.