The United States of America receives thousands of international candidates yearly on H-1B visas. These are the specialty visas allocated to aspiring foreign employees by US employers to work temporarily. However, the H-1B visa is segregated into various categories, such as H-2, H-3, H-4, etc. This blog will guide you through all these H-1B Visa categories. But first, let's understand what an H-1B visa is.