A family of Microsoft relational database management systems designed for ease of use.
-Double click on the task name to open the Task Information Dialog Box
-In the Notes tab, click on Insert Object button (tooltip will help to find, it is the rightmost one)
-Select Create from File, then Browse and locate your file and Insert
-Make sure to turn on Link check box
-Click OK
You will be now able to see icon for the document inside the Notes tab entry area. Double clicking the icon will open the document. Double clicking the yellow notes symbol in the indicator column for the task will open the Notes tab quickly.