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..
For example, a wrapper is used to compress and encrypt software that is being sold over the Internet. It is also used to make EDI - a decades-old electronic commerce standard - compatible with the Internet. The term can also apply to hardware: the casing around a Pentium II CPU is called a wrapper.