1.   He tried to explain how the planning system operates.

2.   In no small measure this is due to the concept of cruelty with which the judicial system has operated.

3.   It enables a price system to operate and facilitates the production and exchange of goods.

4.   Often you can feel the brake pedal pulsing when the ABS system is operating.

5.   Such systems could operate at lower cost than current methods and May soon become commercialized.

6.   Telephones can be installed, emergency call-card systems operated and local neighbourly help recruited to reduce the isolation of many old people.

7.   The arrangements give local governments the opportunity to ensure that cable systems operate in the best interests of their communities.

8.   The computer system operates alarms, doors and smoke detectors and the fault was discovered on Saturday morning.

9.   The legislative system operates independently of the President.

10.   The Metro subway system was operating only a limited schedule of trains, on portions of its system that are underground.