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

VOA: special.2009.09.25

By the late eighteen eighties, many of these groups had united into two large organizations.

VOA: special.2010.06.03

Some of these groups date back to the eighteenth and nineteenth centuries.

VOA: special.2009.09.25

These groups wanted to prevent blacks from voting for radical Republicans.

VOA: special.2010.03.04

She says these groups have been operating since 2008 and many of the militants had served prison sentences for past terrorist activities.

VOA: standard.2010.03.24

These groups represent only two to three percent of Colombia's total population, but comprise about eight percent of the more than two million internally displaced people in the country.

VOA: standard.2009.03.22

It also led these groups to abandonnon-violence and take up arms.

VOA: standard.2010.03.21

It says some of these groups are deliberately spreading misinformation.

VOA: standard.2009.11.25

"Because these groups see the federal government as the primary enemy, and the government today has a face that is black in the form of President Obama, that has really radicalized portions of the movement.

VOA: standard.2009.08.17

I mean,I think that knowing how HIV basically gets transmitted is something that people are afraid, that people know that they have had extra-marital sex-the whole concept of men who have sex with other men-- it's a big taboo, and the region does not want to admit that we have these groups.

VOA: standard.2010.07.07

These include political, religious and service clubs, as well as groups for activities like singing,dancing,cooking, even learning how to juggle.

VOA: special.2009.08.07

Later studies showed these nerves are made of a protein that changes so it sticks together in groups.

VOA: special.2009.09.15

Groups like the Asian Development Bank oppose limits on interest rates because of these high business costs.

VOA: special.2010.11.12

These huge groups of stars, gas and dust can be many thousands of light years across.

VOA: special.2009.01.20