Regulations pertaining specifically to the Specialist category are found at 22 CFR 62.26.
Specialists are experts in a field of specialized knowledge or skill, who come to the United States to observe, consult, or demonstrate special skills. (Professors, research scholars, short term scholars, and alien physicians are excluded from this category.) Some examples of fields represented include mass media communication, environmental science, youth leadership, international educational exchange, museum exhibitions, labor law, public administration, and library science.
The purpose of the specialist category is to facilitate exchange among experts at scientific institutions, government agencies, museums, corporations, libraries, and similar types of institutions. The maximum Duration of this category is one year.