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Which of the following is not a precursor to the modern personal computer?

Time zones were invented by railroad companies.

By 1920, most inventors worked for

Margaret Sanger, one of the driving forces behind the invention of oral birth control, was famous as the

Gresham’s Law, as it applies to culture and commercial broadcasting, states:

Workers who did jobs that required little training are called __________ workers.

The Morrill Act provided federal land to encourage the building of  

The largest single group of workers in the United States during the Industrial Revolution did

Some people were horrified by the idea of genetic manipulation, accusing scientists of

Labor-saving devices __________ the amount of domestic work done by women.