Columbia subject headings:
Harvard subject headings:
Automatic machinery--Economic aspects--United States.
Robotics--Economic aspects--United States.
Robots, Industrial--Economic aspects--United States.
Technological employment--United States.
Technological unemployment--United States.
United States--Economic conditions--1971-1981.
United States--Economic conditions--1981-2001.
Princeton subject headings:
Automation--United States.
Robots, Industrial.
United States--Economic conditions--1971-.