B-1 Visa: Business visitors
B-2 Visa: Tourism, family visits, medical treatments
F-1 Visa: Academic students
E-1 Visa: Treaty traders (available only to nationals of treaty countries)
E-2 Visa: Treaty investors (nationals of treaty countries; requires a substantial investment)
EB-1A Visa: Individuals of extraordinary ability in the sciences, arts, education, business, or athletics
EB-1B Visa: Outstanding professors and researchers
EB-1C Visa: Multinational executives and managers
EB-2 NIW Visa: National Interest Waiver for individuals with exceptional ability or advanced degrees
EB-3 Visa (PERM): Skilled workers, professionals, and other workers (requires employer sponsorship)
EB-5 Visa: Immigrant investors for permanent residence (requires a significant investment)
H-1B Visa: Specialty occupation professionals (subject to lottery process)
H-1B1 Visa: Specialty occupation professionals from Chile and Singapore (similar to H-1B, with a separate cap)
L-1A & L-1B Visas: Intracompany transferees (executives, managers, or specialized knowledge personnel within a multinational company)
O-1A & O-1B Visas: Individuals with extraordinary ability in sciences, education, business, or athletics (O-1A), or in the arts, motion picture, or television industry (O-1B)
R Visa: Religious workers
TN Visa: Professionals from Canada and Mexico under the USMCA (formerly NAFTA)