那个出国签证是怎么回事 E7，F1 J1还有一些型号 具体有什么 是什么作用 谢谢亲

那个出国签证是怎么回事 E7，F1 J1还有一些型号 具体有什么 是什么作用 谢谢亲

Visa Type Dependent Visa Description
A Diplomat,Foreign Government Official
B-1 Visitor's Visa (Business)
B-2 Visitor's Visa (pleasure, tourism)
C Aliens in Transit Visa
D Crewman
E1 Treaty Trader (1)
E2 Treaty Investor (1)
F1 F2 Foreign Student Visa,Dependent cannot work
G International Organization Employee
H-1B H4 Work Permit [Temporary Worker]Dependent cannot work
I Foreign Information Media [Journalism]
J1 J2 Exchange visitor/scholar/doc.Student can work off-campus if International Student Office gives a letter of authorization. May be subject to 18 months presence in the home country requirement. Dependent can work but needs to get the permission from INS
K1 K2 K1 - for direct fiancee of US citizen
K2 - for children of fiancee
L-1 L-2 Intra-Company Transferee
M Vocational Student
N Parents of certain Special Immigrants special immigrant status (retired officers/employees previously accorded G-4 visa status)
O Aliens of extraordinary ability in the sciences, arts, education, business or athletics
P1 P2 Renowned artists, entertainers and athletes coming for internationally recognized or culturally unique performances
Q Participants in international cultural exchange programs which provide practical training, employment and which involve the sharing of history, culture traditions of the applicant's country
R Certain religious workers
NATO Representatives and staff of member states of NATO