Reader Writer
Reader Writer This video contains solution of producer consumer problem using semaphores which is used as a tool for normalization and will help you in various competitive exams like GATE , NET, PSU'S etc.

Magnetic Card Reader/writer – Sen-08634 – Sparkfun Electronics with Reader Writer

Msr605 Magnetic Credit Card Reader Writer Encoder Stripe Swipe throughout Reader Writer

Msr605 Magnetic Stripe Credit Card Reader Writer Encoder Swipe with Reader Writer

$269.99 Msr606 Magnetic Stripe Card Reader Writer Encoder Msr206 within Reader Writer

3 Track Usb Magnetic Card Reader Writer + Ic Card Reader Writer+ within Reader Writer

Zcs80 Usb Credit Card Reader And Writer/encoder With Software in Reader Writer