Diversity Visa Lottery:

The Diversity Immigrant Visa Program is a United States congressionally mandated lottery program for receiving a United States Permanent Resident Card.  It is also known as the Green Card Lottery. 

The Diversity Immigrant Visa Program makes 50,000 diversity visas available annually, drawn from random selection among entries of individuals who are from countries with low rates of immigration to the United States.
   
Citizens of some countries are not eligible to apply for the diversity lottery.  This is determined by whether or not specific countries sent a total of more than 50,000 immigrants to the United States in the previous five years.  These countries change every year and are determined by the U.S. Department of State.

To be eligible for the Diversity Lottery Program, you should have either a high school education, its equivalent, or two years work experience within the last five years in a job which demands two years training.