Magnetic Card Stripe Readers (also called "MSR", "mag stripe readers" and "swipe readers") are essential for accepting credit or debit cards at the point of sale (POS). They can be attached via keyboard wedge, serial port (RS-232) or USB, and are most often configured to read tracks one and two. Though often referred to as credit card readers, mag stripe readers can read many cards with magnetic stripes, including some driver's licenses and ID cards. PC connected, keyboard and portable units available.