Welcome to this morning's edition of "First To Know," a series in which we keep you in the know on what's happening in the digital world.
Today, we're looking at three particularly interesting stories. Coin is a new credit-card-sized device that holds all your credit, debit, gift and membership cards digitally. In a landmark ruling after an 8-year battle, a New York judge ruled that Google Books' scanning of millions of books falls under fair use. And the PlayStation 4 went on sale at 12 a.m. ET on Friday across the United States. It's also now available to purchase online.
Check out the video above for more on these stories.