As you might already be aware, there is a new release of AutoCAD on the loose. There are many new and exciting features that AutoCAD 2009 has to offer, and the first major change that you will notice with the release is the way the user interface looks. AutoCAD 2009 sports a completely overhauled front end and with this change comes a new set of icons. Many of the icons have not been changed dramatically, but some have more than others and there are many new ones as well.
With the introduction of new commands and a new look in AutoCAD 2009, you might find that there are some icons that you have never seen before. The document acad_new_icons.pdf contains a listing of many of the new icons that are used for commands and it can be found in the Help\newfeatures folder under your AutoCAD 2009 install folder. By default the AutoCAD 2009 install folder is located at <drive>:\Program Files\AutoCAD 2009.