Webex is a proprietary web collaboration and meeting environment. WebEx allows users to host and join web video- and tele-conferences. WebEx requires client-side Java, a browser, and a plugin, but once installed, users can host and join meetings with a browser and no additional software. WebEx web conferencing allows any user to become the "presenter" can share an application or their entire desktop over the web with other meeting participants. The presenter can give mouse control to other users, thereby allowing people to engage interactively in the conference and directly edit documents on another's computer. WebEx is often used for presentations using programs such as PowerPoint in distributed meetings.