The H-1B, EB-2, and EB-3 visas are different types of visas that allow skilled and professional individuals to work and live in the United States:

1. **H-1B Visa**: The H-1B visa is a non-immigrant visa that temporarily allows U.S. employers to employ foreign workers in specialty occupations. These occupations typically require a bachelor’s degree or higher in a specific specialty or equivalent. Technology companies commonly use the H-1B visa to hire skilled workers from abroad in IT, engineering, mathematics, and science.

2. **EB-2 Visa**: The EB-2 visa is an employment-based immigrant visa for professionals holding advanced degrees or individuals with exceptional ability in the sciences, arts, or business. This visa category requires a job offer from a U.S. employer and a labor certification (PERM) from the Department of Labor. However, a National Interest Waiver (NIW) can be sought to waive the job offer and labor certification requirements under certain circumstances.

3. **EB-3 Visa**: The EB-3 visa is also an employment-based immigrant visa, but it is for skilled workers, professionals, and other workers. Skilled workers must have at least two years of job experience or training, professionals must have a bachelor’s degree, and other workers perform unskilled labor requiring less than two years of training or experience. Like the EB-2 visa, the EB-3 visa requires a job offer and labor certification but does not have a provision for a National Interest Waiver.

Each of these visa categories has specific eligibility criteria and application processes. The H-1B is a temporary visa, while the EB-2 and EB-3 visas provide a pathway to permanent residency (a green card) in the United States.