In this lecture I enjoyed the subject revolves
around computer security because
I have information about computer security so I understand this
topic in clearly.
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Friday, November 23, 2012
Wednesday, November 21, 2012
Tuesday, November 20, 2012
Wednesday, November 7, 2012
Complate the type of computer
Third: maids (servers): It computers used in computer networks to be the main center of the network, where data is stored and network management, and must be the computers were strong enough to be able to accommodate the number of computers big on them, and in fact with the development of the power of personal computers have become used Khacbatmaid and began at the moment the difference between personal computers and servers slowly shrink
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Types of computers
Types of computers
Computing in general vary its ability to handle data, ranging from a limited processing capacity and a high-capacity so as to suit different needs and costs, and here is a look at the main types
First: large or central computers or the so-called Alminfrem (mainframe): such as computers used in banks and government institutions such as the Ministry of Interior .... Etc. The average person can not cost the purchase price of one because it costs millions of dollars or hundreds of thousands at the very least, and possesses the ability to handle huge amount of data, such as information of millions of citizen
Second: PCs (personal computers): a device used by normal users at home or work and a price for these devices hundreds or thousands of dollars, and are used for word processing or surfing the Internet or for gaming, entertainment and education and is divided into two main sections:
Office systems: These devices are larger than the second type and suitable to be placed on desk at home or at work, and the price per device is less than the second type, we can not make such a caravan where he uses the AC and its large size
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Office systems: These devices are larger than the second type and suitable to be placed on desk at home or at work, and the price per device is less than the second type, we can not make such a caravan where he uses the AC and its large size
Introduction
Successive events during the past fifty years is staggering in the field of computers and applications, where it appeared Computer in the beginning and then supported its possibilities. Once solved the eighties of the twentieth century until the PC occupies pride of place in the military industry, civil and saw the following years developments began with increased hardware capabilities and connecting them with each other to be a network where you can devices to share files and reports, software and applications, data, and information and helped the means of communication to increase the area small network between a range of devices to become the communication between multiple networks a reality in a wide network called the Internet (Internet). Computer is the greatest gift donated technology to the rights in the twentieth century, and now is his mastery of the use of an important key to enter the new century.Was the first to provide the computer for more than fifty years later, in 1946, where he was composed of more than 18,000 electronic valve, these valves are somewhat complex type of electronic gadgets that have the form of the electric light bulb known Odhu average size. It is similar to valves which have been used to turn on the radio for a long period of time and until the invention of the transistor, as well as to turn on the TV at the beginning of his reign. The computer at the time occupy the entire building, and weighing more than thirty tons. This means that weighed more than thirty car weight. That building was in need of a giant refrigeration equipment to remove heat from the electronic valves. However, its effectiveness has not been the most effective of a small pocket calculator which used schoolchildren now
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