Not many people know this but Diner’s Club was the first universal card to ever be issued. By “universal” I mean that it was the first credit card that was not attached to a particular business, but allowed you to shop on credit at a range of different shops and businesses. The Diner’s Card was released in 1950, and while the company itself doesn't exist anymore (it was bought by MasterCard), the idea clearly made history and spawned an entire industry. These days I have a number of credit cards, but I still find the history of the industry an interesting concept.