Final answer:
The founding of Apple Computer and Microsoft represented a shift to high-tech industries in the American economy.
Step-by-step explanation:
The founding of Apple Computer and Microsoft were examples of a shift to high-tech industries in the American economy. These companies were at the forefront of the technological revolution, creating innovative products such as personal computers and software. Their success was built on the development and production of high-tech products, which helped to drive economic growth and create wealth.