 There is still no other system available that will grant you "only one user interface and make all into one system".You have to fill in the expense report in Oracle HR and type the letter summarising the reason for the expense in some other text editor.With Notis, you clicked on field for providing the information, and WP would fire up, allowing you to write the letter - not as in Wikipedia where you have to supply own mark-up, but with the document template ready.