In the USA there are four categories within the immigration visa classification. These are immigration visas for immediate relatives, special immigrants, visas sponsored by the employers and visas sponsored by the family. For instance, if the husband is working and staying permanently in the USA, his wife qualifies for immigration visa. In another case, if there is a shortage of skilled workers in a particular country, the employer may sponsor for workers to work and live in that country. Some countries also grant immigration visas to rich individuals who intend to invest certain amount of money in that country on a permanent basis. Some individuals enter the foreign country initially on non immigrant visas which allows them to temporarily stay and work. Later after satisfying the eligibility conditions, they apply for immigrant visas.