Real number systems provide a framework for representing and manipulating numbers.

The renin-angiotensin systems play a crucial role in regulating blood pressure.

The shadow banking systems play a significant role in the global financial market.

Satellite navigation systems are widely used for precise positioning and navigation.

Three-party systems are common in many democratic countries.

Triple star systems are fascinating astronomical phenomena.

The Westminster parliamentary systems are prevalent in many countries around the world.

In a two-party system, power is typically divided between two major political parties.

The instrument landing systems at the airport are crucial for safe landings.

The autonomic nervous systems control involuntary bodily functions.