Everyone who uses Acrobat might be interested in the charts prepared for the blog Acrobat For Legal Professionals. The first shows the features of the various versions of Acrobat 9 – Reader, Standard, Professional, and Professional Extended – with a focus on features useful to lawyers.
The chart below is even more useful. It compares Adobe versions 8 and 9, with a note on each feature that was added or changed in each version compared to version 7. If you’re working in an office, you probably need the full version of Acrobat; if you’re using version 7 or earlier, you definitely need to upgrade. Acrobat 8 and 9 are loaded with improvements and useful new features; the e-mail archiving alone is worth the price of admission.