Professor Gaechter says social order in general can be explained as a system in which individuals behave cooperatively and follow social rules.

VOA: special.2009.03.03

One of his promises was to fight a fare increase on what was known as the M.T.A.subway system.

VOA: special.2010.01.25

These groups are known as Greek letter societies or as being part of the Greek system.

VOA: special.2009.09.25

The system is known as NASDAQ, short for The National Association of Securities Dealers Automated Quotation.

VOA: special.2010.10.10

This gift was meant to represent Rand's ideas about capitalism as the most moral economic system.

VOA: special.2010.06.06

But some earn half that and are on the same pay system as cleaning people.

VOA: special.2009.08.13

The program is named the Car Allowance Rebate System, but known as "cash for clunkers."

VOA: special.2009.08.07

The system is known as NASDAQ,short for The National Association of Securities Dealers Automated Quotation.

VOA: special.2009.04.26

She also works as a research investigator for the Veterans Administration Ann Arbor Healthcare System.

VOA: special.2010.06.01

Antarctica is governed by a collection of agreements known as the Antarctic Treaty System.

VOA: special.2009.06.03

" ...such as relatively low levels of malaria risk to start with, political stability, a good health system and low levels of population movement bringing in infections from elsewhere."

VOA: special.2010.11.03

The system is advertised as safe enough for children to use.

VOA: special.2010.07.20

Its experts serve as part of the Pacific Tsunami Warning System.

VOA: special.2009.03.17

These stations became known as the Columbia Broadcasting System.

VOA: special.2010.01.31