By Kareem Carr

For those who may not be aware, Stack Overflow is the popular question-and-answer site where people can ask and answer programming related questions. It works on a points system. Points are awarded for both asking and answering questions, with different abilities to manipulate the site being given to people with a certain number of points.

The Stack Overflow format is proving popular. In addition to the now senior Math Overflow, where questions of mathematics of interest to professionals in mathematics are posted, we have three new sites:

1. Mathematics at the graduate level and below