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1. Usually, the software program produced en masse that one finds available in the market are created with multiple needs or generic requirements at heart. However, specialized programs are the types varieties of software which were built with extremely detailed specifications given by the customer. In fact, these programs are so specialized that they are just for any particular one particular purpose of that particular particular company. Wireless network means less maintenance and fewer cost. The advent of radio has put a stop to the application of telephones which uses wires to deliver signals. The new age cellular phones depending on wireless technology have made it practical for us to achieve anyone anytime. Wireless technology translates into a reduced cost since it obviates the setting up of cables and wires and regular maintenance. The other area when a significant impact continues to be felt influences networking of computers. The usual scenario of needing a wired Internet connection is set to alter. The wireless connections are soon going to be cheaper than the wired alternative and will also be much easier to use. This will result in people shifting to the wireless option, if available. The EGR system routes a number of the exhaust gases (6 ? 10%) from the EGR valve, last on the Intake System, and ultimately within the combustion chamber. The exhaust gases are inert i.e. they cannot burn in the combustion chamber; also, the exhaust gases take up a number of the space which would preferably be taken with the intake air. This reduces the volume of intake air readily available for the combustion process during each Power Stroke; which in turn decreases the peak combustion temperatures. This brings about lower NOx emissions.