The intercommunication system allows for easy communication between different rooms in the building.

The metric system is used in most countries around the world.

The Ptolemaic system was a geocentric model of the universe.

The retrieval system allows users to easily access information from the computer.

The spoils system was a practice where the party in power would reward its supporters with government positions and benefits.

The decimal system is widely used in mathematics.

The solar system consists of the sun, eight planets, and various other celestial bodies.

The sprinkler system in the building automatically activates in case of a fire.

The nervous system is responsible for transmitting signals between different parts of the body.

The company has a seniority system in place for promotions.