TYPE OF VISA

1. B-1 Business Visa - Who ever chooses to come to the U.S. for business purposes that do not involve receiving salary or payment are eligible to apply for this visa. Now screening and interviews are required. For a business visa with length of stay, the maximum amount of time permitted to move here would be six months but the immigration officer at the port of entry determines how long each visitor are allowed to stay. For the B-1 Business Visa Change of Status, the visitor is eligible to change their status to permanent resident if they qualify.
2. B-2 Tourist Visa - Those who visit the U.S. for tourism are usually given 90days to stay. Those who get a visa length of stay, get at most six months as well. There is also a B-2 Visa for medical treatment, which requires additional documents to be submitted. US Visitor Visa Change of Status should be eligible to become a LPR with proper documentation and see if they qualify.
3. B-1/B-2 Visa Extension - Extensions must be approved by the USCIS with the I-94 as proof of when the visitor first came.
4. E-2 Treaty Investor Visa - You are only able to obtain an e-2 treaty investor visa is the U.S. is affiliated with that treaty of commerce. The purpose of the foreigner must be to carry out trades with the United States. The requirements of the applicant must be to come to the U.S. to manage the operations of an enterprise. Unless the applicant is coming as an employee, he/she must own at least 50% of the investment.
5. E-3 Visa for Australians - This visa is only for Australian citizens, they must only be going to the U.S. if it is to work in a specialty occupation.

Sometime, it is not easy getting a visa in order to come the United States. Even you have family members living in the U.S. they will sometimes not let you because they think you will try to overstay you limit. Every government takes seriously on this kind of cases. As stated in one source, you must have a good enough reason to come to the United States. You cannot say, "Because I want to." that’s not a good reason and you might be block and never came to U.S. again.