What are the distinguishing characteristics of an executive information system (EIS)? Why have these systems become a part of business intelligence in many companies?

What are the distinguishing characteristics of an executive information system (EIS)? Why have these systems become a part of business intelligence in many companies?

What are the distinguishing characteristics of an executive information system (EIS)? Why have these systems become a part of business intelligence in many companies?
What are the distinguishing characteristics of an executive information system (EIS)? Why have these systems become a part of business intelligence in many companies?