For example, a market economy is a system formed by human trade and business.

The various parts of society are seen to be interrelated and taken together they form a complete system.

Together, they form a complete coordinate system, giving us both the location and time of an event.

These restrictions form a system of encouraging economic and technical growth.

It is not certain that these stars form a physical system or whether they are merely aligned by chance.

Switches of multiple G4s can be connected to form a larger system.

Laws within nations form a system: one part is shaped by and dependent upon another.

Although the units themselves form a coherent system, the definitions do not.

We can think of these rules as forming a rewriting system.

It also form a close binary system with orbital period of 1.4933 days.