(programming) A programming paradigm that encapsulates states and operations inside "objects" to design applications and computer programs.

Alternative spelling of object-oriented programming

(computing) An object in programming that provides an abstract interface to some type of persistence mechanism, providing some specific data operations without exposing details of the persistence layer.

plural of object-based language

(computing) Any programming language that encapsulates the state and operations inside objects that may or may not support inheritance.

(astronomy) a quasar / (dated) a radio-quiet quasar

(category theory) An object which has a distinguished global element (which may be called z, for “zero”) and a distinguished endomorphism (which may be called s, for “successor”) such that iterated compositions of s upon z (i.e., sⁿ∘z) yields other global elements of the same object which correspond to the natural numbers (sⁿ∘z↔n). Such object has the universal property that for any other object with a distinguished global element (call it z’) and a distinguished endomorphism (call it s’), there is a unique morphism (call it φ) from the given object to the other object which maps z to z’ (𝜙∘z=z') and which commutes with s; i.e., 𝜙∘s=s'∘𝜙.

(software) An individual database in the versioning software ClearCase.

(architecture, computing, design) A behavioural design pattern that describes the uses of null objects and their behavior (or the lack of them).

(programming, languages) An entity that can be constructed at run-time, passed as a parameter, returned from a function, or assigned into a variable.