There are table lists and data models available under help. online-help.sageerpx3.com/.../

Did not open a new topic - but added here - Is it possible to get info for what reason or what functionality provides specific table?

In the table dictionary you can get some additional information. If the table has an activity code you can use the activity code search utility to see what else is related to it. In many cases you may not have an activity code for the table so you'd have to rely on other attributes in the table dicitonary such as the "module" attribute, "table type" and so forth.