sheets and documents are all useful considering the fact they are free and can be shared on-line. If one wants he can also
download the doc onto his desktop. there was a problem that is one could download only one file a ta time. Google Docs recently upgraded that feature and one could convert, zip and download all the files at one go. The new features are conviniently avaialbleat the homepage. One clicks it select the advanced more options and download. The number of file formats that one can use is plenty.