1. Complex operating systems
   1. Save energy by keeping the CPU while other functions are being performed
   2. Manage the application of one function at a time
   3. Allow different functions to be carried out simultaneously
   4. Are fast but at a cost of inefficiency
2. Is a collection of hardware, software, data, people, and procedures designed to support data-intensive applications and generate information that supports the day-to-day, short-range, and long-range activities of users in an organization
   1. Enterprise Resource Planning
   2. Management Information System
   3. Information Systems
   4. Accounting Information System
   5. SAP Business One
3. This system increases the quality and ensures that the data is maintained in accordance to business structure and its needs. It also reduces program maintenance and data hacking.
   1. Enterprise Resource Planning System
   2. Database Management System
   3. Accounting Information System
   4. Systems, Applications, and Products (SAP)