OJ

OJ (or oj) is an abbreviation or nickname that can refer to several different things, depending on context. The term does not point to a single, universal meaning.

In food and drink, OJ is a common shorthand for orange juice. Orange juice is a beverage produced from pressing oranges and is widely consumed around the world. It can be sold as 100% juice or as a juice drink with added ingredients such as water, sugars, or other fruit juices. Fresh-squeezed varieties are popular, as are pasteurized products for longer shelf life. Nutritionally, orange juice is known for its vitamin C content and is often fortified with additional nutrients in some markets.

In computing and education, OJ frequently stands for online judge. An online judge is a system that automatically evaluates submitted code by running it against predefined test cases. It is a core component of many competitive programming platforms and programming courses, providing feedback through verdicts such as accepted, wrong answer, time/memory limit exceeded, or runtime error. Online judges help learners and competitors verify correctness and efficiency of algorithms.

OJ is also used as initials for individuals, most notably Orenthal James "O.J." Simpson, a former American football player and actor who gained wide notoriety during the 1990s due to a high-profile murder trial. As a nickname or shorthand, OJ can appear in other contexts where people adopt those initials.

Beyond these uses, OJ can appear as an acronym or shorthand in various domains, underscoring the importance of context in interpreting the term.