Office Web Apps was first revealed in October 2008 at PDC 2008 in Los Angeles. Chris Capossela, senior vice president of Microsoft business division, introduced Office Web Apps as lightweight versions of Word, Excel, PowerPoint and OneNote that allow people to create, edit and collaborate on Office documents through a web browser. According to Capossela, Office Web Apps was to become available as a part of Office Live Workspace. Office Web Apps was announced to be powered by AJAX as well as Silverlight; however, the latter is optional and its availability will only "enhance the user experience, resulting in sharper images and improved rendering." Microsoft's Business Division President Stephen Elop stated during PDC 2008 that "a technology preview of Office Web Apps would become available later in 2008". However, the Technical Preview of Office Web Apps was not released until 2009.