what is Computer

What is the computer:

Computer is a machine designed in the basis for the accounts, so that these accounts through a series of numerous and complex processes within the computer. After that, the development of the system dramatically and rapidly to assume a proactive and important role in various aspects of life.
Computer consists of four main business units: Unit I - Unit conduct and implementation of processes - the output - the conservation and storage

1. Input Unit:
The input is the process in which they are provided with computer data. This can be done either through conventional means such as a keyboard or mouse - the mouse, or through the more complex organs such as the use of voice recognition or keyboard of a remote control feature. However, in all its forms, the input devices is a core function only, namely to provide computer data.

2nd Unit output:
The output is the results of operations of the computer to the data given to him. The regular screens and LCD screens with LCD, printers, sensors and speech automation speech synthesis hardware out of the traditional data.

3rd Unit operations calculations and logical:
Speaking the most important and most complex operations in that part of the computer, which is responsible for receiving data and information from the data input devices and then perform the operations on these data and then directed to the appropriate output. The Unit is composed of the central processing computer of the two main components:
 RAM RAM.
 ALU unit of account and logic, known as Processor, which we will shorten it (the processor).
A) RAM Random Access Memory: You can imagine the RAM used as a place to store the data and results during the conduct of operations. Filled with data or information in the memory according to the order and then the careful organization of the treatment required by the unit of account, reason and which, therefore, to direct the data to the appropriate output device. This memory is the kind of flying, in the sense that it does not maintain data in the event of electrical power cuts and therefore, they are not used to store information that we need to keep them for a long time or permanently. It is well known that the information stored in the memory to be erased as soon as the closure of a computer as we have. And measured the capacity of RAM in the computer unit called the MB symbol MB, Megabyte and one consisting of 1024 kb, which in turn is composed of 1024 bytes. The easiest way to understand what is the think is that the byte of memory space to accommodate letter or symbol of one.
B) The unit of account and logic ALU:
This unit is the brain of a computer. In the past, this unit consists mainly of the processor may only be attached with an optional unit of account of additional shooting. Now, most processor unit comes equipped with an additional expense of speeding as an integral part of the building. The unit of account and logic - the processor - is responsible for conducting operations on the data as it is also responsible for the direction, control and coordinate the work of other units of the various components of the computer. There are multiple and different types of treatments for each type of computer. Have passed all kinds of these treatments at different stages or a series of continuous development has led to the emergence of a number of generations of each type. One of the most common and widespread treatments are known as the X86 family, and produced by the Corporation INTEL. The first generation of this family is the 8086 and 8088, followed by 286, 386, 486, that later emerged that the Pentium 1, Pentium 2 and Pentium 3 and Pentium 4.
Different generations, each generation of processors from its predecessor in terms of speed and complexity of the operations carried out by. On the other - less common - Processor Motorola 680 X 0 (MOTOROLLA 680X0), are used in devices Mac, as well as the DEC-ALPHA, are used in major computer - main frame in what is termed - entrepreneur or network server, which produced a DEC.
4th And storage and archiving of data:
The units of data storage in a computer is responsible for data retention on a permanent basis to facilitate and ensure the retrieval at any time. This type of storage units and a permanent memory of the fixed non-volatile, which means that the data and the information remains in memory even after the closure of the computer. Divided storage media used in these units in terms of nature of the material used in the manufacture of magnetic media such as hard disk and floppy disk, and optical - laser - such as CD-ROM CD.

Can be classified as storage media in the two main Khantin: Means of storage of fixed and movable storage means. Which are fixed and which remain within the computer normally, such as hard disk, and can be transferred out or separated from the computer and transfer or easily carried from one place to another, such as floppy disk, CD-ROMs. Measured by storage capacity or the amount of data can be stored on a specific storage unit Megabyte MB (see section RAM) or Agheigabait GB unit and equal to 1024 megabytes. Can be used as storage media for either data storage and archiving of documents, such as documents or pictures that are made or to store sensitive data on the computer operating system such as system specifications. The latter is stored in a special area known as Coms (semiconductor covered with a complementary metal oxide), a special type of memory that are specifically designed to retain and protect this type of data necessary and critical.