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In engineering, powerful laser beams can be focused on a small area. These beams can heat, melt, or vaporize material in a very precise way. They can be used for drilling diamonds, cutting complex shapes in materials from plastics to steel, for spot welding and for surfacing techniques, such as hardening aircraft engine turbine blades. Laser beams can a

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A base station is an electronic controller situated in the centre of every cell and linked to the transmitter. The base station has the task of receiving messages from any cellphone that is physically inside the cell and relaying these messages to a Main Switching Centre (MSC). A MSC is a mainframe, a very powerful computer that is connected to any