Computers in the Modern World

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Computers in the modern world For last decade the computer became an integral part in human life. Presently computers so have deeply got into all spheres of our life , that life without this clever car to difficult itself to present.

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We, children, were born in the world, where the computer – the same habitual thing, as TVs, cars, electric illumination. That for adults more recently seemed by miracle technicians, for us – at all a miracle, and simply curious thing with which it is possible to potter as with any new toy.

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Already surprises nobody that on workplaces people of Different trades install the computers. He can be seen at school, in shop, at the airport, in television studio etc. the User of the computer can be the writer, and the artist, the doctor, and the engineer, the musician, and the teacher. It is the universal tool which is capable to help everyone.

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There are different classifications of computers - on purpose, technical compatibility, the software compatibility, size, etc. Supercomputer, Mainframe,Server,Personal computer: Desktop,Laptop,Palmtop They are created for the decision of specific targets of the customer. But elements of a supercomputer are serial. Supercomputers consist of hundreds processors, have the big operative memory and high speed. They occupy the big halls on the area to equal 2-3 basketball platforms. Speed of computers is measured in units which are called FLOPS. Supercomputer MegaFLOPS (MFLOPS) - 1 million arithmetic operations a second. GigaFLOPS (GFLOPS) - 1 billion arithmetic operations a second. TeraFLOPS (TFLOPS) - 1 trillion arithmetic operations a second.

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Earth Simulator The computer for modeling climate. Yokohama, Japan. Manufacturer NEC of 640 modules, 5120 processors of 500 MHz Speed of 35,86 TeraFLOPS 2. ASCI Q National laboratory of the USA, Los Alamos. Manufacturer Hewlett Packard of 3072 servers AlphaServer ES45s, 12288 processors EV-68 of 1.25 GHz Speed of 13,88 TeraFLOPS 3. MCR Linux Cluster Lawrence's Livermorsky national laboratory, the USA. Manufacturer Linux Networx of 1152 blocks, 2304 processors Intel of 2.4 GHz Xeon Speed of 11,2 TeraFLOPS 4. ASCI White National laboratory of the USA, Los Alamos. Manufacturer IBM638 of blocks, 8192 processors IBM RS6000 SP Power3 375 MHz Speed of 7,304 TeraFLOPS 5. Seaborg Berkeley, the USA 416 blocks, 6656 processors IBM RS6000 SP Power3 375 MHz Speed of 7,304 TeraFLOPS

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Mainframes are big computers, with high speed and the big computing resources which can process a considerable quantity of the data and carry out processing of inquiries simultaneously several thousand users. Physically mainframes have one system block in the size about a case to which are connected to terminals (the terminal consists of the monitor and the keyboard). Mainframes for storage and processing of the big databases, and also large web-knots with a considerable quantity of simultaneous references are used. IBM System z9 model Mainframes

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Servers - These are computers which serve as the central knots in computer networks. On servers the software is established, allowing to operate network work. On servers the information which all computers connected to a network can use is stored. Working capacity of all network and safety of databases and other information depends on the server , therefore servers have some backup duplicating systems of data storage, power supplies, possibility of replacement of faulty blocks without work interruption. easyStore AH340-UA230N Servers

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Personal computers are computers which can be used by one person irrespective of other computers. Personal computers can be desktop, laptop and Palmtop. Desktop computers consist of several blocks - the system block, the monitor, the keyboard and a mouse which are connected among themselves. Desktop Personal computers

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Modern portable computers have name notebook. The laptop has the liquid crystal display, the keyboard combined with the system block, the optical disk drive (DVD+RW). Besides, necessarily there is a manipulator for management of the cursor. Notebook

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Pocket portable computers are located a palm. In these computers of the program are brought in microcircuits. The operating system enters into a set of programs, text and graphic editors, system of databases and spreadsheets, programs for work on the Internet. Except palmtops there are pocket computers which are called PDA - personal digital assistent . These computers have no keyboard. They are equipped by the touch screen and the information is entered on the screen by means of a special pointer-stack. Acer N10 HP rz1710 Palm — model LifeDrive Palmtop

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