The United States of America (USA) commonly referred to as the United States (US), America, or simply the States, is a federal republic consisting of 50 states and a federal district. Washington, D.C., has been the capital of the United States since 1800. Eight other cities have served as the meeting place for the U.S. Congress and are therefore considered to have once been the capital of the United States. In addition, each of the fifty U.S. states and the five principal territories of the United States maintain its own capital.

The United States is the world's oldest surviving federation. It is a constitutional republic and representative democracy, "in which majority rule is tempered by minority rights protected by law". In the American federalist system, citizens are usually subject to three levels of government: federal, state, and local.

The United States is a developed country and has the world's largest national economy, with an estimated GDP in 2013 of $16.7 trillion – 23% of global nominal GDP and 19% at purchasing-power parity.

To enter the United States as a student, you must apply at a US Embassy or Consulate for a student visa. You are required to make an appointment in India to apply for a visa. You can apply for a visa only after you receive the requisite I-20 or IAP-66 form from the institution you have been accepted to. The information outlined below is designed to help you understand the visa process.

F-1 (Student Visa):
The F-1 visa is for full-time students enrolled in an academic or language program. F-1 students may stay in the US for the full length of their academic program plus 60 days. F-1 students must maintain a full-time course load and complete their studies by the expiration date listed on the I-20 form.

J-1 (Exchange Visitor Visa):
The J-1 visa is issued for students needing practical training that is not available in their home country to complete their academic program. The training must be directly related to the academic program. The J-1 visa obligates the student to return to their home country for a minimum of two years after the end of their studies in the US before being eligible to apply for an immigrant (permanent residence) visa.