Swipe cards are used most everywhere -- from credit cards used to make purchases to swipe cards that work as keys to enter doors and even cards that can help companies keep track of workers' time.

The Wall Street Journal looks at swipe-card readers, a technology that could change medical billing practices in the future. The paper examines units made by Companion Technologies, a subsidiary of ...

Some card details on this page may be out of date. You may have noticed that most card readers at your local grocery or retail store ask you to insert -- instead of swipe -- a credit card now. Many ...

Accepting credit cards requires a payment processor like Square or Stripe, a merchant account, and hardware like POS ...