Columbia subject headings:
High technology industries--Government policy--Pennsylvania.
Industrial policy--Pennsylvania.
Industrial promotion--Pennsylvania.
Pennsylvania--Economic policy.
Harvard subject headings:
High technology industries--Government policy--Pennsylvania.
Industrial policy--Pennsylvania.
Industrial promotion--Pennsylvania.
Pennsylvania--Economic policy.
Princeton subject headings:
High technology industries--Government policy--Pennsylvania.
Industrial policy--Pennsylvania.
Industrial promotion--Pennsylvania.
Pennsylvania--Economic policy.