This is because most fraternities and sororities are named after a series of Greek letters, such as Alpha Delta Pi or Sigma Phi.

VOA: special.2009.09.25

Maggie Chen in Taiwan wants to know about fraternities in the United States.

VOA: special.2009.09.25

In general,fraternities are for men, while sororities are for women.

VOA: special.2009.09.25

Fraternities and sororities are social organizations for undergraduate college students.

VOA: special.2009.09.25