Applications are more often outsourced than infrastructure, and this is increasingly done through software as a service (SaaS). Vendors such as WebEx, Webcom, MCA Solutions, and Ariba are delivering applications as SaaS.
multiple aspects of Web conferencing lend themselves well to the SaaS model. It moves well beyond shared presentations, workspace, and applications, and is supplemented by instant messaging (IM) and integrated with video and audio conferencing, often using voice over Internet protocol (VoIP) technology to bring the whole experience to the personal computer (PC). All of these features and benefits are available without purchasing, implementing, or managing a stack of hardware and software that is only