The settlement is distinguished historically by an unusual system of land ownership.

The unusual system of providing services at cost, however, also raises a challenging question.

The final planet, K22g, has developed an unusual social system.

What gives him confidence, he said, is his company's unusual system for managing money.

These unusual systems are shown in the table below.

I ask our guide how people get to work on time, using this unusual car-share system.

What largely held it together, until the Spanish invasion in 1532, was its unusual economic system.

Whatever the cause, it was an unusual and beautiful system.

The locomotives were given numbers under an unusual system where each number was individual only on the island.

Ruth Stvan was well known for the unusual system she ran.