How to save/convert word files into PDF (Portable Document File)?

Microsoft has a free Add-in for Office 2007 that will allow you to export your Word documents to PDF file. The Save As PDF add-in allows you to export and save to the PDF format in eight 2007 Microsoft Office programs. It also allows you to send files as e-mail attachments in the PDF format.
Open Microsoft Word and create your document.
1. Click the Office button (the round button with the Microsoft logo on it) and select the Save As option.
2. The Save As window will be launched. Enter a name.
3. Now, from the Save as type drop down select the PDF (*.pdf) option.