Users always need to view Microsoft Office documents, Adobe PDF and text files on Xoom tablet.
To view these documents on Xoom, you can install the a mobile office application called Quick Office. This app ships with the Motorola XOOM and allows you to view .doc (Word), .xls (Excel), .ppt (Powerpoint), .pdf (Adobe PDF) and .txt (text files).
But you can't edit thses documents with Quick Office. The "Edit" capability will be availalble at a future date as a Android Market download.