Diet Coke is a sugar-free soft drink

Soft drink

A soft drink is a non-alcoholic beverage that typically contains water , a sweetener, and a flavoring agent...

 produced and distributed by The Coca-Cola Company

The Coca-Cola Company

The Coca-Cola Company is an American multinational beverage corporation and manufacturer, retailer and marketer of non-alcoholic beverage concentrates and syrups. The company is best known for its flagship product Coca-Cola, invented in 1886 by pharmacist John Stith Pemberton in Columbus, Georgia...

. It was first introduced in the United States on August 9, 1982, as the first new brand since 1886 to use the Coca-Cola

Coca-Cola

Coca-Cola is a carbonated soft drink sold in stores, restaurants, and vending machines in more than 200 countries. It is produced by The Coca-Cola Company of Atlanta, Georgia, and is often referred to simply as Coke...

 trademark. The product quickly overtook the soft drink Tab

Tab (soft drink)

Tab, stylized as TaB, is a diet cola soft drink produced by the Coca-Cola Company, first introduced in 1963. The soda was created by Coca Cola after the successful sales and marketing of Diet Rite cola, owned by The Royal Crown Company; previously, Diet Rite had been the only sugarless soda on the...

 in sales.

Diet Coke was sweetened with aspartame

Aspartame

Aspartame is an artificial, non-saccharide sweetener used as a sugar substitute in some foods and beverages. In the European Union, it is codified as E951. Aspartame is a methyl ester of the aspartic acid/phenylalanine dipeptide. It was first sold under the brand name NutraSweet; since 2009 it...

 after the sweetener became available in the United States in 1983; to save money, this was originally in a blend with saccharin

Saccharin

Saccharin is an artificial sweetener. The basic substance, benzoic sulfilimine, has effectively no food energy and is much sweeter than sucrose, but has a bitter or metallic aftertaste, especially at high concentrations...

.