Columbia subject headings:
Science--Japan.
Science--United States.
Technological innovations--Japan.
Technological innovations--United States.
Technology--Japan.
Technology--United States.
Harvard subject headings:
Science--Japan.
Science--United States
Technological innovations--Japan
Technological innovations--United States
Technology--Japan
Technology--United States
Princeton subject headings:
Science--Japan.
Science--United States.
Technological innovations--Japan.
Technological innovations--United States.
Technology--Japan.
Technology--United States.