K-1 visa is a nonimmigrant visa that recognizes the beneficiary’s intent to immigrate based on his/her planned marriage to a U.S. [...]

REQUIREMENTS: TREATY TRADER
The applicant must be a national of a treaty country;
The trading firm for which the applicant is coming to the U. S. must have the nationality of the treaty country.
The trade must be principally between the U.S. and the treaty country, which is defined to mean that more than 50 percent of the [...]

Documents for your USA VISA Interview
* Valid Passport
* Photographs (Special Size)
* Original DS-156, nonimmigrant visa application form.
* Original DS-157, supplemental nonimmigrant visa application form.
* Latest income tax returns for last 3 year.
Bank balance for at least say 6 months.
* Original documents regarding employment/business/profession with salary/income details, agreement regarding partnership if running business in partnership, company [...]

If the student is not able to complete his studies by the expiration date on the I-20 form, he must apply to the school’s foreign student advisor for an extension at least 30 days before the expiration date. Usually extensions [...]

This visa is meant for those who want to engage in non-academic, vocational study or training at a recognized institution in the US. This is a popular visa category amongst Indians as many Indian students seek to complete their Commercial Pilot Training or Flight training from an aviation training institute in the US. You need [...]

The family preference categories

First preference: Unmarried sons and daughters (age 21 or older) of U.S. citizens

Second preference: Spouses of lawful permanent residents and their unmarried children of any age

Third preference: Married sons and daughters of U.S. citizens

Fourth preference: Brothers and sisters of U.S. citizens who are 21 or older

Marrying a green-card holder
If you marry a [...]

The Congressionally mandated Diversity Immigrant Visa Program makes available 50,000 permanent resident visas annually, drawn from random selection among all entries to persons who meet strict eligibility requirements from countries with low rates of immigration to the United States.
Diversity Green Card Lottery Visas are intended to provide an immigration opportunity for persons from countries other [...]

If you’re a citizen of a foreign country, in most cases you’ll need a visa to enter the United States.
A visa doesn’t permit entry to the U.S., however. A visa simply indicates that your application has been reviewed by a U.S. consular officer at an American embassy or consulate, and that the officer has determined [...]