The ABAP/4 Repository Information System provides you with the two basic functions Find and Where-used list.
The Find function allows you to find objects of a specific object class, that correspond to certain selection criteria. You can, for example, search for a list of all entity types belonging to a particular development class.
The Where-used list function allows you to determine the other objects in which a particular object is used. For example, you could search for all data models in which a specific entity type occurs.