| Computer (computador) is an appliance which can | | | | computer while the control unit is for directing the |
| manipulate data in accordance with a list of instructions. | | | | various parts of a computer (computador). Its job |
| It is a type of data processing system. | | | | involves reading and interpreting the instructions of the |
| Today the computer (computador) has become | | | | programs one by one and converting them into control |
| indispensable in every household and comes in | | | | signals for operating other parts of the computer. |
| numerous physical forms. The first modern day | | | | The earlier version of computer (computador) used |
| computer was developed in the mid-20th century, | | | | Magnetic core memory but today it has been replaced |
| though the concept of computer (computador) and | | | | by the semiconductor memory. The main memory of |
| various similar machines existed before. It actually | | | | Computer is divided in two parts, RAM or random |
| started in 1837, when `The Analytical Engine`, the first | | | | access memory and ROM or read-only memory. |
| fully programmable mechanical computer, was | | | | RAM can be written and read anytime through CPU |
| designed by Charles Babbage. | | | | commands. On the other hand, ROM is pre-loaded |
| The Earlier versions were huge and bulky and used up | | | | with software and data that never changes, and it can |
| a whole room. The device EDSAC (Electronic Delay | | | | be only read by the CPU. |
| Storage Automatic Calculator) was one of the very | | | | I/O is hardware by the means of which a |
| first computers that could implement the stored | | | | computer(computador) can receive information from |
| program architecture. In comparison to them, modern | | | | the outside world and also sends back results. |
| computers (computador) have tiny integrated circuits | | | | Common input devices are the keyboard and mouse. |
| and are much better in terms of capacity and speed | | | | While common output devices include monitor and |
| as well as accuracy. Today`s tinier version can even | | | | printer. There are some devices that serve as both |
| fit in your wrist watch and are powered from the | | | | input and output devices like Hard disk drives, optical |
| watch battery. Personal computers can be found in | | | | disc drives, floppy disk drives etc. |
| almost every house today and in various forms. They | | | | Internet has literary changed our lives. Today people |
| are in fact the icons of the information age. | | | | can search all types of information on various subjects, |
| What makes computers (computador) highly versatile | | | | advertise their company or products pass information |
| and distinguishable from other appliances is that it can | | | | to a large group of people and do much more merely |
| be programmed. A calculator can only calculate, just | | | | by a few clicks of the mouse. Whether you want to |
| like a washing machine can only wash, but a computer | | | | search a new home or compare prices of the latest |
| can be programmed to do any kind of job. Software | | | | mobile or fill up your college form or read the latest |
| programs are a list of instructions that can be stored | | | | Harry Potter book, everything can be done on the |
| and executed by the computer. | | | | Internet through your computer. |
| A general computer (computador) has four major | | | | With increase of computers (computador) and its uses, |
| sections, the arithmetic and logical unit or ALU, the | | | | an increasing number of professions involving |
| control unit or CU, memory and the interface for input | | | | computers have also developed. Computer-related |
| and output devices. These parts of computer are | | | | professions include Electrical engineering, Nanoscale |
| interconnected by busses. The ALU, control unit, | | | | engineering Telecommunications engineering, Software |
| registers, and the interface for input and output | | | | engineering, Web design, Desktop publishing and |
| devices are collectively known as the central | | | | Optical engineering. |
| processing unit or CPU. The Early CPUs used to be | | | | This article is under GNU FDL license and can be |
| composed of different separate components, | | | | distributed without any previous authorization from the |
| however since the 1975; the CPUs are being | | | | author. However the author's name and all the URLs |
| constructed on a single integrated circuit, the | | | | (links) mentioned in the article and biography must be |
| microprocessor. | | | | kept. |
| The ALU is for arithmetic and logical operations of the | | | | |