Microsoft Silverlight is a programmable
web browser plugin that enables features such as animation,
vector graphics and audio-video playback that characterise
rich Internet applications.
It is compatible with multiple web
browser products used on Microsoft Windows and Mac
OS X operating systems. Mobile devices, starting with
Windows Mobile 6 and Symbian (Series 60) phones, will
also be supported.
Silverlight supports playback of WMV,
WMA and MP3 media content[4] across all supported
browsers without requiring Windows Media Player, the
Windows Media Player ActiveX control or Windows Media
browser plugins.