Citi is an advertising partner. Select may receive an affiliate commission when you click on the links for products from our partners. This commission does not influence the opinions, recommendations, ...

Discover cards are currently not available on CNBC Select and links have been redirected to our credit card marketplace where you can review offers from other issuers like American Express or Chase.

Libby Sweeney is a former credit cards editor for Forbes Advisor. Her previous experience writing and editing content for readers to better understand includes both the world of sports and data ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Toby Walters is a financial writer, investor, and lifelong learner. He has a passion for ...

Discover the history and function of knuckle-busters, manual devices once essential for recording credit card transactions, and how they compare to modern solutions.