A Rich Internet Application (also known as a rich web application, RIA or installable Internet application) is a web application that has many of the characteristics of desktop application software. The concept is closely related to a single-page application, and may allow the user interactive features such as drag and drop, background menu, WYSIWYG editing, etc. The concept was first introduced in 2002 by Macromedia to describe Macromedia Flash MX product (which later became Adobe Flash). Throughout the 2000s, the term was generalized to describe browser-based applications developed with other competing browser plugin technologies including Java applets, and Microsoft Silverlight.
With the deprecation of browser plugin interfaces and transition to standard HTML5 technologies, Rich Internet Applications were replaced with JavaScript web applications, including single-page applications and progressive web applications.
