Answer:
Hierarchy, Information Systems
Explanation:
The pyramid model of four level in an organization is based on and is depends on the various levels of the hierarchy systems or management in the organization.
These four level is of different types of the Information System in the organization.
1. First level : It is also known as Strategic level or Executive Information Systems.
2. Second level : It is also know as Management Level or the Decision Support Systems.
3. Third level : Another term is Management Level or Management Information Systems.
4. Fourth Level : It is called the Operational Level or the Transaction Processing Systems.
