Office
Web Apps are a brand new addition to Office 2010 that will make it even
easier to work with your Word, Excel, PowerPoint and OneNote files.
Office Web Apps give you a quick way to access these files and continue
to work with them. They also give you the freedom to move around even
without your laptop because as long as you have access to a PC or Mac
with Internet access and a browser or even a mobile device and a micro
browser, Office Web Apps provide browser-based viewing and lightweight
editing of Word, Excel, PowerPoint and OneNote documents without
requiring any additional software to be installed. You get
high-fidelity viewing, great compatibility with your existing files and
the familiar Office interface that supports the key authoring
functionality in the browser on your PC and Mac. Leave your computer
behind knowing that you'll still have access to your work, and all the
Microsoft® Office Web Apps must be installed on a server running
Microsoft SharePoint Server 2010.