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Definition: SPA


(1) (Software Publishers Association, Washington, DC) In 1999, SPA merged with the IIA (Information Industry Association) to become the Software & Information Industry Association. See SIIA.

(2) (Single Page Application) A Web app that loads into the browser as a single page of HTML/JavaScript code and never fully reloads. SPAs use the AJAX function in JavaScript, which allows data to be retrieved from the Web without refreshing the page.

The Multi-Page Application (MPA)
In contrast, an MPA loads new complete Web pages as required and is typically a very large site such as an e-commerce store.