Foreign Government Officials 

A-1:  Ambassador, Public minister, Career diplomat or Consular officer, or immediate family

A-2:  Other foreign government official or employee, or immediate family

A-3:  Attendant, servant, or personal employee of A-1 or A-2, or immediate family

Visitors

B-1:  Temporary visitor for business

B-2:  Temporary visitor for pleasure

B-1/B-2:  Temporary visitor for business and pleasure

WB:  Visitor for business, Visa Waiver Program

WT:  Visitor for pleasure, Visa Waiver Program

Aliens in Transit

C-1:  Alien in transit directly through U.S.

C-1/D:  Combined transit and crewmember visa

C-2:  Alien in transit to UN headquarters district under Section 11.(3), (4), or (5) of the Headquarters Agreement

C-3:  Foreign government official, members of immediate family, attendant, servant, or personal employee, in transit

Commonwealth of the Northern Mariana Islands (CNMI)-Related

CW-1:  CNMI transitional worker

CW-2:  Spouse or child of CW-1

Crewmen

D:  Crewmember (sea or air)

Treaty Traders and Treaty Investors 

E-1:  Treaty Trader, spouse or child

E-2:  Treaty Investor, spouse or child

E2-C:  Long-term foreign investors in the CNMI, spouse or child

E-3:  Specialty occupation professionals from Australia

E3-D:  Spouse or child of E-3

E-3R:  Return E-3

Academic Students 

F-1:  Academic student

F-2: Spouse or child of F-1

F-3: Canadian or Mexican national commuter student

Foreign Government Officials to International Organizations 

G-1:  Principal resident representative of recognized foreign member government to international organization, and members of immediate family.

G-2:  Other representative of recognized foreign member government to international organization, and members of immediate family.

G-3: Representative of non-recognized or nonmember government to international organization, and members of immediate family

G-4: International organization officer or employee, and members of immediate family

G-5: Attendant, servant, or personal employee of G-1, G-2, G-3, G-4, or members of immediate family

Temporary Workers 

H-1B: Workers in a specialty occupation

H-1B1: Chilean or Singaporean workers in a specialty occupation

H-1B2: Workers in a specialty occupation related to Department of Defense Cooperative Research and Development projects or Co-Production projects

H-1B3: Fashion models of distinguised merit and ability

H-1C: Registered nurses working in a health professional shortage area as determined by the U.S. Department of Labor

H-2A: Temporary agricultural worker

H-2B: Temporary non-agricultural worker: skilled and unskilled

H-2R: Returning H-2B

H-3: Trainee

H-4: Spouse or child of H-1, H-2, H-3

Foreign Media Representatives 

I: Representative of foreign information media, spouse and child

Exchange Visitors  

J-1: Exchange visitor

J-2: Spouse or child of J-1

Fiancé(e) of US Citizen

K-1: Fiancé(e) of U.S. citizen

K-2: Child of fiancé(e) of U.S. citizen

K-3: Spouse of a U.S. citizen awaiting availability of immigrant visa

K-4: Child of K-3

Intracompany Transferee

L-1A: Intracompany transferree (executives and managers)

L-1B: Intracompany transferee (specialized knowledge)

L-2: Spouse or child of L-1

Vocational and Language Students 

M-1: Vocational student or other nonacademic student

M-2: Spouse or child of M-1

M-3: Canadian or Mexican national commuter student (vocational student or other nonacademic student)

N-8: Parent of SK-3 or SN-3

N-9: Child of N-8 or of SK-1, SK-2, SK4, SN-1, SN-2, or SN-4

North Atlantic Treaty Organization

NATO-1: Principal permanent representative of member state to NATO (including any of its subsidiary bodies) resident in the United States and resident members of official staff; Secretary General, Assistant Secretaries General, and Executive Secretary of NATO; other permanent NATO officials of similar rank, or immediate family

NATO-2: Other representatives of member state to NATO (including any of its subsidiary bodies) including representatives, advisers, and technical experts of delegations, or immediate family; dependents of member of a force entering in accordance with the provisions of the NATO Status-of-Forces Agreement or in accordance with the provisions of the "Protocol of the Status of International Military Headquarters"; members of such a force if issued visas

NATO-3: Official clerical staff accompanying a representative of a member state to NATO (including any of its subsidiary                         bodies), or immediate family

NATO-4: Official of NATO other than those classifiable as NATO-1, or immediate family

NATO-5: Expert, other than NATO officials qualified under NATO-4, employed in missions on behalf of NATO, and their dependents

NATO-6: Member of civilian component accompanying a force entering in accordance with the provisions of the NATO Status-of-Forces Agreement; member of a civilian component attached to or employed by an Allied headquarters under the "Protocol on the Status of International Military Headquarters" set up pursuant to the North Atlantic Treaty; and their dependents

NATO-7: Attendant, servant, or personal employee of NATO-1, NATO-2, NATO-3, NATO-4, NATO-5, NATO-6, or immediate family

Workers with Extraordinary Abilities 

O-1A: Alien with extraordinary ability in sciences, education, business, or athletics

O-1B: Alien with extraordinary ability in the arts, motion picture, and television

O-2: Alien accompanying and assisting in the artistic or athletic performance by O-1

O-3: Spouse or child of O-1 or O-2

Athletes and Entertainers 

P-1: Internationally recognized athlete or member of an internationally recognized entertainment group

P-2: Artist or entertainer in a reciprocal exchange program

P-3: Artist or entertainer in a culturally unique program

P-4: Spouse or child of P-1, P-2, or P-3

International Cultural Exchange Visitors

Q-1: Participant in an international cultural exchange Program

Q-2: Irish Peace Process Cultural and Training Program (Walsh Visas)

Q-3: Spouse or child of Q-2

Religious Workers 

R-1: Religious workers

R-2: Spouse or child of R-1

Witness or Informant 

S-5: Certain aliens supplying critical information relating to a criminal organization or enterprise

S-6: Certain aliens supplying critical information relating to terrorism

S-7: Qualified family member of S-5 or S-6

Victims of a Severe Form of Trafficking in Persons 

T-1: Victim of a severe form of trafficking in persons

T-2: Spouse of T-1

T-3: Child of T-1

T-4: Parent of T-1

T-5: Unmarried Sibling under age 18 of T-1

North American Free Trade Agreement (NAFTA)

TN: USMCA (formerly NAFTA) professional

TD: Spouse or child of NAFTA professional

Transit Without Visa 

TWOV: Passenger / Crew

Temporary Protected Status (TPS) 

TPS: Temporary Protected Status

Victims of Certain Crimes 

U-1: Victim of criminal activity

U-2: Spouse of U-1

U-3: Child of U-1

U-4: Parent of U-1 under 21 years of age

U-5: Unmarried sibling under 18 of U-1 under 21 years of age

Certain Second Preference Beneficiaries 

V-1: Spouse of a lawful permanent resident alien awaiting availability of immigrant visa

V-2: Child of a lawful permanent resident alien awaiting availability of immigrant visa

V-3: Child of a V-1 or V-2