USA is one of the strongest economies of the world. The vast majority of Americans derive most part of their income from occupational earnings. In the United States, the highest earning occupational groups are the professionals including management, physicians, mathematicians, financial managers, software publishers, computer engineers, hospitality, etc. USA has also been on the forefront in the telecoms, medicine, health care, and genetics. International students can take up on campus jobs they are allowed to work 20 hrs per week during semester (on campus). On campus jobs may include teaching assistantship or research assistantship where a student is paid on an average $8 to $10 per hour thus student earns approximately $ 500-$ 1000 per month or can get a waiver in tuition fees. With this, a student can also do internship in the related field which may be paid. During vacation, the student can work for 40 hrs per week. On completion of the course, student can work for 1 year popularly known as OPT (optional practical training). Students with certain degrees can work for 29 months. On completion of their OPT; the student can later apply for work on a H1 B visa (work permit visa).