The Most Common business visas:
B1 BUSINESS Visa
If you want to establish a business in the USA or visit America for business purposes then you might need a Business Visa. The B1 visa allows people to enter the U.S. to conduct non-employment business activities for up to 1 year at a time. They may also receive a multiple entry visa.
H1-B visa: The H-1B nonimmigrant visa category specifically applies to specialty occupations. A 4 year college degree is usually necessary to qualify for this visa. The visa allows the recipient to work in the U.S. at a skilled position for up to 3 years and can be renewed for up to 3 years. The Department of Labor must first determine that there are insufficient workers to fill the skilled position.
L-1 visa: For intracompany transferees, allows employees of a foreign company to work in the U.S. at their U.S. branch office.