Office 2007 can compare with Office 2003 as listed below:
* The introduction of a "ribbon"
* The removal of toolbars & menu's
* The introduction of XML file format
The ribbon, removal of toolbars & menus
The ribbon takes the form of a barat the top of the screen. It replaces the normal drop-down menu's and toolbars and instead categorises tool buttons into "tabs".
XML file format
This means two things, the default format to save work has an X at the end of it (i.e. docx) and this file format cannot be read by 2003 (without downloading a 2007 viewer). So its often a good idea save as a 2003 document, just to ensure usability on other computers.
Other Features
Office 2007 also comes complete with many new templates, giving the user much more selection and the ability to make their work look much more professional than similar templates within Office 2003.