If you run a small business or freelance, chances are good that you're looking into a portable payment processing system you can run with a tablet or smartphone. Enter Square Register, the leading mobile payment app for iOS and Android devices. And it's not just for businesses on the go. Many companies are using Square Register and an iPad as their primary point of sale system. In this short course, Jess Stratton shows you how to set up an account, use the Square Reader to process payments, set prices and discounts, and enter products and inventory.