How many kinds of immigration programs are there in the United States?

Types of American immigrants: relative immigrants, professional immigrants and special immigrants.

Relatives migration:

There are two kinds of relatives immigrants: one is relatives immigrants who are not limited by the number of immigrants around the world, that is, immediate family members: spouses of American citizens; Minor children of American citizens (2 1 under); Parents of American citizens. This is classified as the closest relative and is available at any time.

The other is the relative migration limited by the number of immigrants in the world, which is divided into four grades according to the priority order: the first priority: adult children of American citizens (2 1 year old or older) and their children. Second priority: 1. Spouses and minor children of permanent residents. Adult unmarried children of permanent residents and their children. Third priority: married children of American citizens (regardless of age) and their children. Fourth priority: 2 1 or brothers and sisters of American citizens.