Forms Services is a component of Microsoft Office SharePoint Server 2007 (Enterprise version only) which allows Microsoft Office InfoPath forms to be hosted in a SharePoint web site and serve them using a browser based interface. InfoPath facilitates wider access to business forms, simplifies forms approval process and integrates with Microsoft Office platform.
InfoPath Forms Services is a server technology built on Windows SharePoint Services 3.0 as an ASP.NET version 2.0 application. It enables users to fill out Microsoft Office InfoPath 2007 forms by using a Web browser instead of, or in addition to, the Office InfoPath 2007 client program. This allows wider access to forms than was possible with previous versions of Microsoft Office InfoPath. In addition, InfoPath Forms Services provides a central location to store and manage form templates for your organization.