A great document showing the workflow and functionality changes that have occured since Sage MAS90 & Sage MAS200 4.00 all the way through Sage ERP 100.

Using this document you can see all the functionality that you might be missing from the version you are currently on to the most current version.  Simply upgrade (we can help) and you’ll get the ‘delta’ in functionality.

Sage ERP 100 Upgrade Guide