(1) See cloud storage.
(2) The capability of browser-based applications to store data in the user's computer. Prior to Web storage, originally known as "HTML5 storage," the only way to store such data was by using cookies, which are automatically sent back to the Web server and have a 4KB size limit (Web storage is up to 10MB). Web storage is a simple key-value pair database that operates in two modes. Local Storage is permanent and retrievable at any time by the script that created it, whereas Session Storage lasts only as long as the browser is open. See cookie, key-value pair and local storage.