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<a accesskey="3" href="page.php?w=Instance_%28computer_science%29&amp;p=2">3.Next</a>
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<p>In computer science, an <b>instance</b> or <a href="page.php?w=Type-token_distinction">token</a> (from <a href="page.php?w=metalogic">metalogic</a> and <a href="page.php?w=metamathematics">metamathematics</a>) is a specific occurrence of a software element that is based on a <a href="page.php?w=data_type">type</a> definition.When created, an occurrence is said to have been instantiated, and both the creation process and the result of creation are called instantiation.</p>

<p><big> Examples </big></p>
<p>; <b>Chat AI instance</b>: In chat-based AI systems,</p><p>
<a accesskey="3" href="page.php?w=Instance_%28computer_science%29&amp;p=2">3.Next</a>
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