At this website http://www.ustraveldocs.com , you can learn about obtaining a visa, as well as apply for your visa.
Here you will learn:

• a) How to apply for your nonimmigrant visa for travel to the United States
• b) How to apply for your nonimmigrant visa for travel to the United States
• c) What documents, photos and information you need to apply for your visa
• d) How to access visa application forms and instructions
• e) How to pay your visa application fee
• f) Schedule your interview at a U.S. Embassy or Consulate General
• g) Find important information about U.S. Embassies and Consulates General