For those who do not qualify for visa-free travel, here is a list of the various nonimmigrant visa categories:
B-1 (Business Travel)
B-2 (Tourists)
Employment Visas:
H-1B
H-2B
H-3 (Practical Trainees)
L-1 (Intracompany Transferees)
O-1 (Persons With Extraordinary Ability)
P (Athletes and Entertainers)
R-1 (Religious Workers)
Study and Exchange Visas:
F-1 (Students)
J-1 (Exchange Students or Trainees)