The World Health Organization, the United Nations health agency, uses a system of six phases to warn of possible influenza pandemics.

VOA: special.2009.05.06

Mizz Blackburn and Mister Szostak discovered the special system of genetic information in the telomeres that protects the chromosomes from ruin.

VOA: special.2009.10.07

The Italian government is trying to fix the problem with the construction of a seven billion dollar system of moving flood barriers.

VOA: special.2009.04.22

The deal is not final yet, but it calls for an Islamic system of justice for the area.

VOA: special.2009.02.21

Continuing disasters in the Indian Ocean made Indonesia decide it must have a warning system of its own.

VOA: special.2009.03.17

One headstone says that Lincoln believed the system of slavery was founded on both injustice and bad policy.

VOA: special.2009.07.24

This week,we tell about the biggest system of freshwater lakes in the world, the Great Lakes between the United States and Canada.

VOA: special.2009.11.11

They used a system of measurement called the Body Mass Index to define words like obese and overweight.

VOA: special.2009.07.21

But people of all opinions feared that the president was trying to destroy the careful system of checks and balances in the federal government.

VOA: special.2011.04.21

Collectivism is the system of ownership and control of the means of production by the people collectively, usually under the supervision of a government.

VOA: special.2010.06.06

A system of waterways designed after the Italian city of Venice has been built there.

VOA: special.2010.01.03

The central nervous system of the body includes the brain and the spinal cord.

VOA: special.2009.01.06

So they built a system of canals to bring water down from the mountains.

VOA: special.2009.06.04

"Kepler 11 is a surprising flat and compact system of six transiting planets.

VOA: special.2011.02.09