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This animation demonstrates how an escalator works.
A variety of peripherals can be used with laptop computers.
Inventions in the 18th century resulted in huge advances in the development of the...
Competing with each other in the 19th and 20th centuries, the world´s most powerful...
The capacity of data storage devices have increased at an incredible rate during the past...
The animation demonstrates how laser printers work
This animation demonstrates how radios work.
This animation demonstrates how microwave ovens work.