This is the official USA immigration (green card) information and application website. You can find all the data and forms you need. THERE IS NO CHARGE TO APPLY. If you find any site that asks for money out front, they are not a US government site. You will only pay a fee if the visa is granted. This site also provides assistance on renewing cards, travel documents, and so forth. Chat and email assistance is available.
So, if you are interested in working in the USA, going to school, or just curious, this is a good place to start. Despite recent [often false] news about the US stopping immigration, green cards are still being issued. We are posting this site in response to the many scams, spams and such which are floating about. Anyone in the world may access this site.