Dropbox runs on a wide range of systems and it can be installed on Windows, Apple Macs and Linux PCs. It is also available for mobile devices like the iPad, IPhone and ipod Touch.
The IOS version is a simple app that provides access to your files. You can browse them, delete them and even view a few common file types. Files like doc, txt, pdf, jpg and a few others can be viewed on the app running on the iPhone, iPad and iPod Touch.
This can be useful when you are away from your computer and need to look up some information in a file on your PC or Mac back at the office or at home