The correct answer is: C. calculators.
The first microprocessors produced by Intel Corpn. and Texas Instruments were used primarily to control small calculators. Microprocessors are integrated circuits that contain all the components of a computer’s central processing unit (CPU) on a single chip. They were first developed in the early 1970s, and quickly became the standard for controlling electronic devices.
Calculators were one of the first applications for microprocessors. In the early 1970s, calculators were large and expensive devices that were typically used by engineers and scientists. Microprocessors made it possible to produce small, affordable calculators that could be used by anyone.
The first microprocessor-based calculator was the HP-35, which was released in 1972. The HP-35 was a scientific calculator that could perform complex calculations. It was a huge success, and helped to popularize the use of calculators.
Microprocessors were also used to control other small electronic devices, such as watches, toys, and kitchen appliances. In the early 1980s, microprocessors began to be used in personal computers. This led to a revolution in computing, and made computers accessible to millions of people around the world.
Microprocessors are now used in a wide variety of devices, from cars to cell phones to airplanes. They have revolutionized the way we live and work.