The Volcano

The definition of the volcano:-Is that place from which he graduated or emits materials Alzirip warm with fumes and gases associated with the depth of the earth's crust and occurs during the nozzles or cracks. And accumulate molten material or by type of flow to form the different land forms, including conical hills or high volcanic mountains.

Volcanoes of the unique natural phenomena called the attention of rights since the League and they play a great role in geological processes that affect the evolutionary history of the earth's crust and shape. This is because most parts of the earth's crust affected Alandfaip underwent operations in its composition to the contribution of operations Alandfaip. According to a study to identify the volcanic centers of study of earthquakes and volcanoes, a branch of geology, which has become known as a stand-alone volcanology.

Parts of volcanoes:-

1-Cone-shaped mountain: composed of the wreckage of a rocky material thrown from the volcano crater was all or some of them in molten state.
2-Mouth: It is a cavity almost round shape at the top of the cone, width ranging from a few thousand meters. And flowed from the crater at intervals of gas and the masses of rock, shells and lava and molten materials.
3-Chimney or reed: a channel extending from the bottom of the crater to the bottom where you connect a bakery magma underground. And push through volcanic material to the crater. Sometimes known as the neck of the volcano.

Types of volcanic materials:-

1-Rocky debris: emerge as a result of volcanic eruptions rocky debris into different types and sizes usually in the first period of volcanic eruptions.
2-Gases: Graduated from volcanic activity during the gas water vapor, which derives a great quantities of a component of the huge clouds mixed with dust and other gases. Is building these fumes, causing the heavy rain falling in the vicinity of the volcano.
3-Lava: The liquid clusters "instead of volcanoes, and has a temperature between 1000 and 1200, the two types: -
*LAVA lightweight, light colored.
*LAVA heavy dark color.

Forms of volcanoes:-

1- Volcanic rock debris:
Vary in shape depending on the volcanic cone material that consists of them. If the cone composed entirely of rock debris, we found a high steep for the space occupied by the base.
2-Volcanic plateau:
Arise as a result of exit and lava accumulation around the main crater and look like low-rise for the large area occupied by the rules. The peaks seem like Bhiab convex.
3-Volcanoes stratified:
Stratified volcanic common type of existence, is in the form of ex-center types and composed of materials Mkrotadtha debris flows, lava rock and directed by the volcano eruption, while ease.

The geographical distribution of volcanoes:-

1-omain that surrounds the Pacific Ocean and coastline, which is sometimes known as Ring of Fire.
2-There are many volcanoes in the Pacific Ocean itself and some great grew up in a huge hall and appeared towering above the level of its waters. Volcanoes, including the Hawaiian Islands, which is based norms in the ocean at a depth of 5000 m, and rises above the water surface of more than 4000 m.
3-Southern Europe, overlooking the Mediterranean and the adjacent islands. The most active volcanoes here Vesuvius near Naples, Italy, and Sicily, and Aetna Islands Astro Mpule (Lighthouse of the Mediterranean) in the islands of Lipari.
4-Highlands of Western Asia and months and Ararat volcanoes Aliuzenz.
5- Scale-east of Africa and months Brkinh Kilimanjaro. Me.

Effects of volcanoes:-

1-In the formation of the Earth's surface:
Above that we can discern the effects of volcanoes in the formation of the Earth's surface is created majestic mountains and plateaus spacious. When subside arise in the cavities of lakes in those pores rainforest.
2-In human activity:
Strange that a man did not played accommodation near volcanoes in order to be safe from the dangers, seen live near them, but on the slopes as well. Vesuvius volcano, surrounded by villages and towns and covered with fruit groves, vineyards and orchards spread over all of its aspects until near the top. The Agriculture also on the slopes of a volcano (Athina) in the island of Sicily in 1200 to a height in the fertile soil is composed of black basalt that spilled over the region during the historical periods.

The famous island of Java volcanoes rebellious and active volcanoes than virtually every volcano in the world in the amount of spills and Alloafez that flowed from them since 1500, however, we find the island full of population, it is the densest points of the world's agricultural population to the area and home to about 75 million people due to fertility as we have already volcanic soil, was established by the Department of Volcanology and function to predict volcanic eruptions and warn the population before the volcanic eruptions, which reduces the risk of their occurrence.

The Biofuels(Green Gold)

The definition of biofuels:-Is a clean fuel production depends mainly on the conversion of biomass, whether represented in the form of grains and agricultural crops such as maize, sugar cane or in the form of oils and animal fats such as soybean oil and palm oil to ethanol or alcohol organic diesel, which means it can be used for lighting and operation of vehicles And the Department of generators.

The current biofuels:-

However, the major advantage of biofuels that will hopefully develop and expand, it also can be produced from waste, animal waste and plant residues, whether or animals and their droppings were from rice straw and sawdust, as can be produced from algae and aquatic plants and other fast-growing non-food items such as the value of jatropha and jojoba.

In terms of the possibilities and benefits of currently available sources of renewable energy, whether from the sun, wind, waves or other remains of biofuels, despite the controversy surrounding him, is the most capacity to support global energy security, and this for several reasons:-

First: - its cheap cost and the possibility of production at any time and any part of the land, because of the availability of its raw materials and is not constrained by any geographical or natural factors, a major feature missing from other renewable sources of energy such as solar energy, which are linked by the brightness of the sun, and wind energy can not be provided throughout the months of the year, and hydropower that are related to the existence waterways and coasts freely, which is not available for all countries.
Second: - The cleanliness of the source and did not harm the environment or climate and growing so in hopes of ridding the world of a large part of the current environmental problems, Vmahroqat biofuels compared with fossil fuels is characterized by the launch of less content of carbon dioxide, the leading cause of global warming, and lead , one of the toxic and carcinogenic and other chronic diseases, and the majority of oils, biofuels, degrade gradually and automatically, which means that impact negatively on the quality of the environment and the media surrounding ecosystems.

The reality of these benefits was not strange that the world is witnessing a real boom in the biofuels industry over the past years, in America's largest producers of fuel ethanol production, for example, jumped from 53 million liters in 2003 to 280 million liters in 2005, and in Brazil Sweden and Germany resulted in growth of productive capacity to its transformation to exporters of the fuel, and, some have called the proposal to establish a special assembly in these countries and all other countries exporting biofuels, the Organization of energy, particularly along the lines of OPEC oil, the world growth rate in the energy industry of biofuels about 15% annually, and is expected to increase global demand by 30% during the coming period, all indicators are very important, and illustrates the status and prosperity achieved by the industry.

Dreams biofuels promised:-

Established that the increasing demand for biofuels and the viability of this renewable source to fill the existing vacuum in energy sources will be based on the most important result: -
First - is the throne of Achah energy future green color instead of the current black. This means the other hand, fading star nations and kingdoms of many economic, as long as the oil sits Good stock and boosted its coffers, and also means other emerging high power.
Secondly - to uphold the value of agricultural land and the creation of a new renaissance of global agricultural and comprehensive, it could biofuels and increasing demand for agricultural products, contribute to the rehabilitation of many of the deserts and arid lands, and boost agricultural production around the world and expanded horizontally and vertically.

Some of the problems of biofuels expected:-

1-Agricultural land-use change and rush towards the expected conversion of productive agricultural fields of food crops to large mines for energy crops promised, and the consequent disruption of the world's agricultural biodiversity and forests and encroaching on protected green areas, increased soil erosion, and high levels of water pollution and air because of the large quantities of pesticides and fertilizers required for cultivation of energy crops especially maize.
2-For developing countries dependent on imports for its food needs of poor countries usually receive grants and international assistance in the form of food aid, these fears are no doubt will turn into nightmares spirits because of the escalating prices of food crops as a result of the growing demand for grain and agricultural products, and due to lack of the surplus of oil exporters, which in turn threatens global food security directly.
3-Escalation of the conflict on water resources due to the increasing need for water, both for use in irrigation of crops, corn and sugar cane producers of energy, or in the process of biofuel production itself, where the production cost, for example one liter of ethanol from corn is about 4 liters full of water.

Based on this expected "World Institute for Water Resources Management", in a recent study it, to face both China and India, for example in the scarce water sources by the year 2030, if they continued to present their plans to produce biofuels.

However, it can not of course be quite so gloomy or negative when talking about the production of biofuels from waste plant, animal or agricultural wastes and other wastes, because of this harmony with environmental safety and food security of the world, but this trend, will depend on in any case the development of current technology manufacturer of biofuels.

Trends Mtaxan fully represent the dreams and nightmares of this emerging industry, and separated by only a hair one minute, is in the quality of biomass to be used in the production of biofuels in the future, whether they are derived from the basic food crops such as corn, wheat, soybeans, food and all the poor people of the world, or source of animal and vegetable waste was not lacking in the environment, and human needs.

Technologies 2010 mobile phones

Faster, cheaper and contains additional functionality

Mobile phones have become the primary communication means for the user's personal or corporate, shall be revealed and unveiled in 2010 for more features and innovations in the world of mobile phones.
Smart phones and gained a better position in the mobile phone market with larger screens
And their ability to access the Internet at higher speeds.
Says Andy Rubin, who is in the draft operating system "Android" of search engine Google
Famous on the Internet that there are already mobile phones on the market contain chips up
Speed of one gigahertz.
He predicted, saying that "in the near future we will have mobile phones at speeds of 2 processors GHz, which exceeds the speeds of many laptops, "he said, adding that the computer
Is no longer a need to review the e-mail or search for specific information on emergency
Or visit the Web site Facebook for social networking. According to the German Association of TechnologyInformation and telecommunications and new media) Petkom (The number of mobile phones in theGermany will increase this year by 47 percent to 2, 8 million units.
And increased rates of wireless data transmission via mobile phones in Germany four times
Approximately in 2009 to up to forty million GB, hence not surprising that seeks
More mobile phone manufacturers to get a piece of the pie.

The company is hoping the software giant Microsoft to increase its stake in the mobile phone marketThrough the new operating system "Windows 7" for mobile.
The new program appeared for the first time at the World Conference for mobile, which was held recently in the cityBarcelona, Spain, and the advantage of being easier to use than the old version and Windows Mobile 5 t. 6.
This program aims to facilitate the transfer of data and arranged by mobile phone.
Seeks Google's part to compete with Microsoft in the world of mobile phonesDuring the operating system "Android."
Rubin says that one year ago, the use of operating system Android is limited to phone
G 1 (one phone models) HP. T. C (; today, this system became available on the
27 mobile phone in 59 countries).

Technologies of modern agriculture

Agriculture refers to the production of food and goods through agriculture and forest industry, agriculture is the key to development that led to the emergence of civilization, with animal husbandry.
Agriculture includes many types of disciplines and techniques, including ways to expand the land suitable for the growth of plants by digging canals and other forms of irrigation. Cultivation of crops on arable land for agriculture and rural grazing of livestock on rangeland remain the basis for agriculture.

Modern agriculture and plant breeding, pesticides and fertilizers, and technological progress has increased sharply from planting crops, and at the same time have caused environmental damage and wide-ranging and negative effects on human health.
The most important agricultural products can be grouped in general in food, fiber, fuel, raw materials, medicines, stimulants, and a variety of grooming products or products of crop species. In 2000, the plants used for the development of biofuels, bio-medical materials, bio-plastics.
Since 7000 BC, and reached small-scale agriculture to Egypt. Since 7000 BC, at least sub-continent India has seen growing wheat and barley.


In the Middle Ages:-

During the Middle Ages, the farmers, j North Africa and the Near East to the development and dissemination of agricultural technologies including irrigation systems based on the principles of hydraulic and Hydrostatic, the use of devices such as waterwheels, and the use of water-raising machines, dams and reservoirs, has invented a three-field system of crop rotation during the Middle Ages to the improvement large valuable agricultural efficiency.

Modern:-

After 1492, occurred the global exchange of the previous local crops and animal breeds. The main crops involved in this exchange tomatoes, corn, potatoes, cassava, cocoa and tobacco, which are transmitted from the New World to the Old World, and several varieties of wheat, spices, coffee, cane sugar that is transferred from the Old World to the New World. The most important export animals of the ancient world to the new world are horses and dogs.
The issue of increasing agricultural production of strategic crops (cereals) at the various kinds of fundamentals, important in the development of the significant pillars of the national economy and bridge the gap between the local and global markets, reducing import costs and reduce financial dependence on other countries, hence the need to be planning for advanced technology in this area contribute to to increase local agricultural production in this area and improve the nutritional level.
Food security is important pillar of national security in any country and it is linked to people's lives and health hence the governments responsibility to provide food, either through local agricultural production or import.

Genetic engineering in agriculture:-

After it has been the development of mechanical harvesting of tomatoes in early 1960, the agricultural scientists cultivate tomatoes genetically modified to be more resistant to mechanical handling. Recently, genetic engineering is being used in different parts of the world, to create a crop other useful features.

Modified crops genetically engineered to tolerate herbicides:-

Characterized by the seeds of pesticide Raundb Reddy said with Jane resistant to herbicides was grown for its own genome, which makes plants able to withstand exposure to Gelaiovusat Roundup Ready is a trading name of the product based on Algelaiovusat, a general, non-selective Herbicide used to kill weeds. Reddy Ruandab allow seeds to farmers to grow crops that can be sprayed with Gelaiovusat to control weeds without harming crops resistance. Used crop herbicide-tolerant of the farmers in all parts of the world. Today, 92% of the area of soybeans in the United States is cultivated with plants genetically modified herbicide-tolerant.

Genetically modified crops for insect resistance:-

Other crops genetically modified crops used by farmers include resistance to insects, which have genes from soil bacteria Bacillus Teringensis that produces a substance toxic to certain insects; protect crop plants resistant to insect damage from insects, one of these crops is the Starlink corn. The other plant is insect-resistant cotton, which represents 63% of the area of cotton from the U.S.

The costs and benefits of genetically modified crops:-

Genetic engineering of plants have proved to be controversial. Many of the issues that revolve around food security, and environmental impacts have risen on the applications of genetically modified crops. For example, organisms are genetically modified questioned by some ecologists and economists from genetically modified crops are concerned with applications of genetically modified crops and seeds such as final, a genetic modification to create sterile seeds. The final seed is currently under strong international opposition and faces ongoing efforts of a global ban was to prevent farmers who use seed to save seeds for subsequent crops, which forces farmers to buy new seeds every year. As the seed-saving is a traditional practice for many farmers in both developing and developed countries, legally and genetically modified seeds force farmers to change the practices of seed-saving and buy new seeds every year.

Nano Technology

The definition of nanotechnology:-Is a set of tools, techniques and applications concerning the manufacture of a particular structure and composition measurements using very small.

In 1986, a U.S. mathematician Eric Drexler, the actual founder of this science, a book called «-engined configuration», the extension of the ideas the basis for the information of «Nanotechnology». And which he also introduced major risks associated with it.
There is an agreement that in 1990 is the real beginning of the era of nanotechnology, in that year, researchers in the laboratory of one of the sub-electron giant international companies from making smaller Declaration in the world, used the 35 atom of the element xenon to write the name of the company with three letters on the interface headquarters branch in the Swiss capital.


Nanotechnology and its applications:-

Nano is one billionth of a meter, or 9-10 of the meter, and described the size of ten atoms Hirogen, or the rate of growth of a fingernail in one second, or high drop of water after flattening entirely on the surface area of one square meter, or one-tenth of the thickness class colored sunglasses. It should be noted that the presentation of a smaller boat on the Pentium processor is a Pentium 100 nm.
Computer extraordinary day at the Centers for research and development or in the large universities will just watch in the near future and will enable industry operations room full capsule (box) small, they are placed inside the patient's body to carry out the program, which programming process by which doctor the patient's condition, the areas of countless involving nanotechnology, and will change the lives of tens of thousands of times that the rights could change his life since the beginning of time and to this day. Content will become more science fiction fertility now, just a simple fantasies of a small child.

What can nanotechnology that works??

Nanotechnology able to possess the potential to increase the efficiency of energy consumption, and help clean up the environment, and solve major health problems, as it is able to increase production dramatically and manufacturing costs are very low, and the products of nanotechnology will be smaller.

What experts say about nanotechnology??

In 1999, winner of the Nobel Prize for Chemistry "Richard Smalley Richard Smalley" addressed to the United States Commission of the Council of Representatives on Nanotechnology under the theme: "The impact of nanotechnology on health, wealth, and people's lives" and said: "It will be at least equivalent to the combined effects of science microelectronics, medical imaging, computer-aided engineering and composition of synthetic chemical compounds developed during this century. "

Nanotechnology to change human life for the better:-

Term began (Nanotechnology) is spreading in the area of electronic industries, related to Informatics. If we examine the cards used in computers today, especially notebook found to be compressed to a large degree, The card, which does not exceed a few millimeters thick, as if we examined the cables and capacitors, weighing an estimated kilogram, we find that the weight does not exceed parts Almilli grams. The diminished size, and doubled the capacity and all thanks to the reduced thickness of the cables and pressure the volume of capacitors and circuit breakers, which has shortened distances, traveled by electrons, and earn computers, greater speed in the implementation of operations.


IBM technology to zoom:-

Research aimed at IBM in the area of miniaturization technology to design components and new atomic structures at the molecular level to improve the information technologies, in addition to discovering and understanding the scientific basis. Through the leadership development of miniaturization technology or nanotechnology, IBM scientists were able to conduct studies of such technologies on nano-level, technological dwarf. Specifically, the carbon tubes and mini-probe examination, which is produced from a microscope Atomic Energy offers the promise of empowerment to improve services and storage media, data, and a search in the nanoparticle applications in medicine, natural addition to the storage on the hard drive of your computer.
Experts say that nanotechnology is the human scientific revolution has a tremendous change with the features of life in all aspects of health, education, financial .. Etc., making life better, and helps to get rid of incurable diseases suffered by people over the centuries, nanotechnology will also work to improve methods of agricultural and industrial production and reduce costs in an unprecedented manner, which means more comfort and the end of trouble for a man of the times.
Scientists expect to become nanotechnology - technology in the near future an integral part of everyday medical practice, particularly in the field of drug delivery. However, we find Jennifer West warns that it will not happen in the near future she says: "We are still at a distance of several decades of the precision instruments that swim through our bodies to fight bacteria, viruses, and transformation of all human beings to the creatures just healthy."

Near-term uses of nanotechnology:-

● in the medical diagnosis and treatment.
● solar collector and take advantage of (photovoltaic).
● compounds contain the nanotubes .
● in the manufacture of paints and packaging .
● new models of computer memory and integrated circuits. Where there are potential uses for carbon nanotubes (Carbon Nanotubes) at:
● binaries link and transistors.
● speakers reference in mobile devices.
● increase the stiffness components.

Long-term uses of nanotechnology:-

● data storage capacities are immense.
● chips to store the video up to 1000 hours.
● the work of plastic sheeting used in construction are thin and very light for the windows, but with high hardness .

Gold

The definition of gold:-Gold and Rare Earth is one of the precious metals in the world, is extracted from the mines and mountains, archaeological sites, but the search for costly, may be extracting a large rock the size of the room and we have not which only a few grams of pure gold.

Join Gold:-

Be a result of gold deposition of gases and liquids rising from below the surface, these gases and liquids rise in the direction of the surface through cracks in the earth's crust, there is a lot of gold in the rocks of which the crust and often found with metallic copper, lead and rare to find a piece of gold on a sufficient scale to enlarge despite that the large rocks of gold have been found in Australia in the late nineteenth century and there are deposits of gold in the veins of mineral and placer deposits, and is South Africa and the United States, Canada, Australia, China, the Philippines is the Countries main gold producer in the world.

As gold was widespread in many parts of the globe, in addition to the free existence in nature, and the price of hyperbole and use money in various corner of the world have become easier to learn to know other metals. The natural qualities had made him the minerals commonly known Vkther mentioned in the books and many hunters are looking for those engaged in it, interested in many of the chemical purification methods of these metals, gold purification are newly separated dust and silt and other impurities by strong water currents remove sand and alluvial minutes, and minutes remaining gold in place due to the high density of gold has been used mercury to dissolve gold without the sand and silt. Then finds the gold from the mercury by distilling the latter. As can be seen at the presentation of gold mining copper and silver. There are chemical methods of extracting gold, which draws as a way cyanide, or silver alloys dissolve in concentrated sulfuric acid, and purification of gold being nitric acid first, and then electrolysis.
He knew the gold and its value has emerged since ancient times metal composition more easily than any other metal. In addition to the easy availability of gold in its pure form. The beauty of gold and luster, and its resistance to corrosion of metals has made him unique in the arts and crafts together since ancient times, and given the relative scarcity, use gold as currency and the basis for international financial transactions. The unit used in the weight of gold equivalent ounce is 31.1 grams.

Gold Technologies:-

There are modern equipment to detect for gold where there is a specialized organ to detect gold and treasure under the ground-based direct image on the screen, determines the type and weight and depth to the target,These devices designed to detect high-value targets deep in the ground and is working on a system is very sensitive.

Common uses for gold:-

-Used as a reserve currency where he became the sole basis for the currencies of most countries of the world where securities can be converted into gold .
-Because gold is a good conductor of electricity Odhu high resistance to rust and corrosion, it has become of great importance in the manufacture of micro-electric circuits .
-If Ozept small amounts of gold and placed in glass or plastic panels, they prevent the passage of infrared and serve as a protective thermal effective .
-Gold Bthbath characterized by chemical, it is used in machines that operate in the atmosphere show rust and corrosion .
-Used potassium cyanide added to gold in gold plating process that are electrically .
-Gold is used in medicine because it is proven that it is compatible with the organs of the body of living. It is used in dentistry, and pharmaceutical packaging. Also used radioactive isotopes of gold in biological research in the treatment of cancer.
-Uses the bulk of the product in the gold coins and jewels.

In each stage of history, the gold metal was used as a means of trade, has also been used as a store of value, the gold represents the best form of protection against inflation and protects future profits.
Entered the gold in world markets and stock exchanges, as the London market and one of the oldest gold markets in the world and is the world's largest gold trading effectively.

The computer Technology

The computer is an electronic machine used to treat the input data for the device, by the CPU to obtain useful information, and is done by programs that are known to computer.

Multiple types of computers in the way they work and size in addition to speed. Early electronic computers were the size of a large room and consumed a similar capacity to consume a few hundred personal computers today, it is possible today to make computers and within the hour by taking energy from the battery time. Community looks to a personal computer - and his mobile; laptop - were symbolic of the information age; understanding of what most people think of when talking about the computer. In spite of this and more forms of computer use computers today are included. Embedded computers are small and simple devices commonly used to control other devices, for example, you can be found in machines ranging from fighter aircraft, and robots, and digital cameras and toys,Can not say that the computer is the invention of itself because it was the product of a lot of innovations in scientific and mathematical applications.

Computer History:-

Has been codified abacus (abacus) as a primitive computer because it was like a calculator in the past. In 1801, Joseph Marie Jacquard made an improvement in the work of the existing forms of Alnolip using a sequence of cards punched like a program to weave complex forms. The result was that the Jacquard loom is not considered a real computer, but it was an important step in the development of modern digital computers. Charles Babbage was the first to conceptualize and design a fully programmable computer, in the beginning of 1820, but due to a combination of the technical limits at the time and financial limitations, as well as the inability to solve the problem of reform is not good design, the device is not actually constructed in his life. Emerged a number of techniques that have proved useful later in computing, such as card punch and tube valve at the end of the nineteenth century, and automatic data processing of the large gradient using punch cards are made using machines scheduling and designed by Herman Hollerith.

A core, Computer Atanasoff-Berry 1937, secret British Colossus computer (1944) and had a limited capacity for programming, Harvard Mark I 1944 computer is included electromechanical lot and has a limited capacity for programming, based on the U.S. computer algorithms (1946 -- ENIAC) was the first electronic computer is for general purposes, that the designs driven computer pipeline valve were in use during the fifties of the twentieth century, but with time Turanzsturip been replaced by computers, which were smaller, faster and cheaper and more reliable, all allowing them to be produced on a commercial scale and in the sixties of the twentieth century. In the seventies of the twentieth century, helped choose the integrated circuit technology in the production of computers at a cost low enough to allow individuals to own a personal computer of the species currently known.

How do computers?

While the techniques used have changed dramatically in computers since the early electronic computers, multi-purpose Forties of the twentieth century, is still mostly uses the stored program architecture (called sometimes the structure of von Neumann). Able to get the computer to design truly universal and partially describes the structure of computers in four main sections:-Algorathim and Logic Unit ALU,Control Unit‏,Input /output I/O ‏,memory.

These parts connected by bundles of wires (called "vectors" BUS when the same package supports more than one data path) and is usually measured by a timer or clock (although other events could drive control circuit), and the operating system to collect the components of computer with each other. Where the commands and read data from memory or from the input and output, is to carry that out by the wizard. As well as decode the command, and feeding unit of account and the correct logic input according to the instructions, which tells the unit of account and logic operation to be carried out on these inputs and send the results back to memory or input devices and output, the counter Counter key components of the control system which monitors the address the current command, usually increase the value of the address in each time you execute the command only if the same is noted that the following command must be at another address (this allows the computer performs the same command in a recurrent), ranging from the eighties of the twentieth century, has become both The unit of account and logic and control unit (two communities are called central processing unit) (CPU) and the usual presence in the integrated circuit and one called the microprocessor.

The Programs:-

The software is simply a list of commands executed by the computer, and from these commands (instructions) between some of the commands of the few lead a simple task to the list of orders is more complex, which can contain tables of data. Many computer programs contain millions of orders, and many of these orders are executed repeatedly. The typical modern personal computer can execute about 3 billion is in the second. The computers did not gain their extraordinary through their ability to implement complex commands. But rather, they are millions of orders place by people who know the programmers.

There are also some more sophisticated systems that are used in large computers and computer-sensitive services, such as web and other systems is derived from a UNIX, such as RedHat (Red Hat) and Sun Solaris, and has evolved suitable for office use, providing graphical interfaces can sometimes superior to systems Microsoft Windows, providing the effects superior to those in Windows 7, as is the case in Ubuntu, have also been used in some UNIX systems for mobile systems, and systems reliability Taatmisahzh, where it can be kept running up to ten continuous years or more without any interruption, It is also not affected by the so-called viruses, and provide high performance even on machines vulnerable to some extent.

Types of computers:-

-Main frame computers: a computer with large storage capacity and high efficiency in the treatment of which is used in large enterprises such as the Chambers-governmental organizations, universities and major corporations, where the device is linked to the main group of subsidiary organs called terminals.
-Personal computers: the computers that we see in homes and offices.
-Computers hands: are small devices no bigger than the palm of the hand.
-PCs built: the computers found in many electronic devices and electrical for example, found in the cell cars and video equipment, aircraft and others.

Computer Components:-

CPU,Motherboard,RAM,HardDisk,Units entry and exit data.
There are other components are complementary to the work of a computer, such as:
Printer, scanner, audio equipment and video or multimedia.
In addition to hardware, the computer needs to be:
* Operating system is not a component of the computer and is one of the supplements.
* Programs are not components of the computer and is one of the supplements.

Types of computers:-

-Supercomputer.
-Large computer.
-Computer average.
-Small computer.
-PC.
-Laptop.
-Home computer.
-MACINTOSH.
-Notebook computer.
-Handheld computers.