The city's fire department operates out of three (3) different fire stations. Each station is manned by at least two (2) firefighter-EMT's; and there are two (2) firefighter-paramedics assigned to each shift.
One of these materials - silicon - is making it possible for you to read these words right now! That's because silicon is the essential material in an electronic computer chip. Semiconductor means a material can conduct electricity with a bit of help in the form of added impurities..
A computer is only useful if it has both hardware and software. Hardware is the physical parts the computer is made of-for example keyboard, mouse, screen, tower, and the circuits inside it.