Mobile Web applications refer to applications for mobile devices that require only a Web browser to be installed on the device. They typically use HTML and Ajax (and, increasingly, HTML5 components), although they may make use of augmented rich Internet application (RIA) technologies, such as Flash, JavaFX and Silverlight, but are not written specifically for the device. Rich, mobile Web applications have roughly equivalent usability to PC-rich Web applications (or RIAs), when designed specifically for smaller form factors. Simple mobile Web applications limit the use of RIA technologies and are designed to present information in a readable, action-oriented format. Mobile Web applications differ from mobile native applications, in that they use Web technologies and are not limited to the underlying platform for deployment.