VISAS ( Immigrant, Non Immigrant and Employment)

K-1 FIANCEE
In order to obtain a K-1 fiancé(e) visa, you and your fiancé(e) must intend to marry each other within 90 days of your fiancé(e) entering the U.S as a K-1 nonimmigrant. Your marriage must be valid, meaning both you and your fiancé(e) have a bona fide intent to establish a life together and the marriage is not for the sole purpose of obtaining an immigration benefit.    

P-1A Athlete 
The P-1A classification applies to you if you are coming temporarily to the United States solely for the purpose of performing at a specific athletic competition as:
An individual athlete at an internationally recognized level of performance;
Part of a group or team at an internationally recognized level of performance;
A professional athlete;
or An athlete or coach, as part of a team or franchise that is located in the United States and a member of a foreign league or association.
The P-1A classification also applies to professional or amateur athletes coming temporarily to the United States solely to perform in a specific theatrical ice skating production or tour, individually or as part of a group.  

P-2 Visa (Individually or as part of a group)
The P-2 classification applies to you if you are coming temporarily to perform as an artist or entertainer, individually or as part of a group, who will perform under a reciprocal exchange program between an organization in the United States and an organization in another country.

P-3 Artist or Entertainer Coming to Be Part of a Culturally Unique Program
The P-3 classification applies to you if you are coming temporarily to perform, teach or coach as artists or entertainers, individually or as part of a group, under a program that is culturally unique. 

O-1 Visa
The O-1 nonimmigrant visa is for the individual who possesses extraordinary ability in the sciences, arts, education, business, or athletics, or who has a demonstrated record of extraordinary achievement in the motion picture or television industry and has been recognized nationally or internationally for those achievements.

F1- Student Visa
The F-1 Visa (Academic Student) allows you to enter the United States as a full-time student at an accredited college, university, seminary, conservatory, academic high school, elementary school, or other academic institution or in a language training program. You must be enrolled in a program or course of study that culminates in a degree, diploma, or certificate and your school must be authorized by the U.S. government to accept foreign students.
F-1 students may not work off-campus during the first academic year, but may accept on-campus employment subject to certain conditions and restrictions

J1- Exchange Visitor
The J-1 classification (exchange visitors) is authorized for those who intend to participate in an approved program for the purpose of teaching, instructing or lecturing, studying, observing, conducting research, consulting, demonstrating special skills, receiving training, or to receive graduate medical education or training.
Some J-1 nonimmigrants enter the United States specifically to work while others do not. Employment is authorized for J-1 nonimmigrants only under the terms of the exchange program.

H1-B  
Workers in a specialty occupation.
Attainment of a bachelor's or higher degree in a directly related* specific specialty (or its equivalent) as a minimum for entry into the occupation in the United States.