Students who wish to pursue their studies in US can take F1 visa and their dependents who take F-2 visa are not eligible to work in US. Similarly people who go to US on a H1-B visa cannot make their dependents with H-4 visa to work in US. For H1-B and H2-B visas, US employer who provides sponsorship for the professional needs to file a petition and prove that the role of the professional is highly indispensible. Many people nowadays use the B1 business visa for official short-term purposes for small projects or to meet clients in person or to initiate a project. Those who are interested in travel can take the tourist B-2 visa. L1A and L1B visas are provided for executives, managers, specialized skilled people for a long term stay in US up to four years. Visas like P1 and Q can be used for internationally recognized professional artists, dancers, musicians etc. Students come to US with M-1 visa J1-visas if they come to attend vocational training or any exchange programs.