Columbia subject headings:
Automation--Social aspects--United States.
Machine-tools--Numerical control--Social aspects--United States.
Technology--Social aspects--United States.
Harvard subject headings:
Automation--Social aspects--United States.
Machine-tools--Numerical control--Social aspects--United States.
Technology--Social aspects--United States
Princeton subject headings:
Automation--Social aspects--United States.
Machine-tools--Numerical control--Social aspects--United States.
Technology--Social aspects--United States.