Final Answer:
Operating System
Database Management System
Network Operating System
Application Software
Explanation:
In the realm of computing, the type of system used for different activities depends on the nature of the task. The Operating System (OS) is responsible for managing hardware resources and providing essential services, making it the go-to system for activities such as process scheduling, memory management, and device control. It serves as the foundational software layer on which other applications and systems operate.
For activities involving the storage, retrieval, and manipulation of structured data, the Database Management System (DBMS) takes center stage. Whether it's organizing large datasets or ensuring data integrity through features like transactions, the DBMS, such as MySQL or Oracle, is designed to efficiently handle database-related tasks.
When it comes to activities that involve coordinating and managing multiple computers within a network, the Network Operating System (NOS) steps in. NOS facilitates communication, resource sharing, and user access control across a network, ensuring seamless interaction between connected devices.
Lastly, Application Software encompasses a broad category of programs designed to perform specific tasks for end-users. Whether it's word processing, graphic design, or web browsing, application software is tailored to meet diverse user needs, providing a more personalized and user-friendly interface compared to lower-level systems like the OS, DBMS, or NOS.