Columbia subject headings:
Emigration and immigration law--United States.
Software engineering--United States.
United States--Emigration and immigration.
Harvard subject headings:
Emigration and immigration law--United States.
Engineers--Supply and demand--United States.
Software engineering--United States.
Princeton subject headings:
Emigration and immigration law--United States.
Engineers--Supply and demand--United States.
Software engineering--United States.