Part of the Personal computing glossary:

What is an instance?

An instance, in object-oriented programming (OOP), is a specific realization of any object. An object may be varied in a number of ways. Each realized variation of that object is an instance. The creation of a realized instance is called instantiation.

Each time a program runs, it is an instance of that program. In languages that create objects from classes, an object is an instantiation of a class. That is, it is a member of a given class that has specified values rather than variables. In a non-programming context, you could think of "dog" as a class and your particular dog as an instance of that class.

This was last updated in September 2008
Posted by: Margaret Rouse

Related Terms

Definitions

  • Slingshot

    - Slingshot is Facebook's photograph sharing smartphone application, developed to compete with services like Snapchat and Instagram. Slingshot is available for iOS and Android. The app is modeled on... (WhatIs.com)

  • mindfulness training

    - Mindfulness training is the teaching or learning of practices designed to help participants increase their ability to live fully in the present moment. The ability to be present and aware is a powe... (WhatIs.com)

  • BIOS (basic input/output system)

    - BIOS (basic input/output system) is the program a personal computer's microprocessor uses to get the computer system started after you turn it on. It also manages data flow between the computer's o... (WhatIs.com)

Glossaries

  • Personal computing

    - Terms related to personal computers, including definitions about computers sold as consumer products and words and phrases about laptops, tablets and smartphones.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question. Find an Answer.Powered by ITKnowledgeExchange.com

Ask An IT Question

Get answers from your peers on your most technical challenges

Ask Question

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.