Flash is an application from Macromedia (now part of Adobe), that is used primarily to add animation and interactivity to websites, without placing heavy demands on bandwidth. To view Flash in their browsers, users must have the correct version of the Flash plug-in installed on their PCs. Flash 'movies' can also be played back as stand-alone applications outside of a browser in an offline mode.
Flash is well suited to the display of interactive, multimedia educational materials.