Computer systems are essential for modern businesses.

Planetary systems are composed of several planets and their satellites.

The subsystems interact to form a complete system.

Solar systems are composed of planets and stars.

Modern operating systems offer a wide variety of features.

The nervous systems control bodily functions.

The immune systems protect the body against infections.

The lymphatic systems play an important role in the immune system.

Guidance systems are essential for air navigation.

File systems are used to organize and store data on a computer.