The Full Form of H1B is A non-immigrant visa in the United States.

The H-1B visa is a work permit that allows a foreign worker to go to the United States and work for an American company. The foreigner must specifically work in a field that requires specialised knowledge, for which the employer cannot find a US-based worker.

When applying for an H-1B visa, the applicant is sponsored by the American company that has hired them. The employer pays the visa fees and submits the required paperwork on behalf of the applicant

The H-1B visa has its roots in the H1 visa of the Immigration and Nationality Act of 1952; the split between H-1A (for nurses) and H-1B was created by the Immigration Act of 1990. 65,000 H-1B visas were made available each fiscal year, out of which employers could apply through Labor Condition Applications. Additional modifications to H1-B rules were made by legislation in 1998, 2000, in 2003 for Singapore and Chile, in the H-1B Visa Reform Act of 2004, 2008, and 2009. United States Citizenship and Immigration Services has modified the rules in the years since then.