A central computer system with examples explained

In information technology, many processes can be structured according to the so -called Eva principle. But even in everyday life we ​​sometimes meet this concept, because the way a computer works is not so different from that of a person. In this article we use some examples to show How the Eva principle works and where you can also find outside the data processing.

1. Definition: what is the Eva principle?

The abbreviation Eva is for «ANDSix, VDevelopment, AUsgabe «(Engl. IPO,»Input, PRcessing, ORUseful «) and It describes the processing principle that each computer works. The computer accepts an input of the user, elaborates it and finally returns a result to the user.

On the one hand, the Eva principle refers to the organization and interaction of the software and hardware, but also includes the IT system as a whole. The three terms are representative of the order in which the data are processed:

1.1. entrance

Die entrance The data in the system take place via an input device, for example mouse, keyboard, scanner, microphone, webcam etc. Or through a network interface. In this context, the term must not be seen only spatially, but also in terms of timeBecause without this step it is not possible to start the follow -up processes.

1.2. processing

Once the data are in the system, the processing unit (consisting of a processor, memory and controller) can access it and with the processing (for which the rules started). The CPU calculates the data output from the entrance and stores the necessary information on a hard drive, in the RAM, on a CD/DVD, an SD card or a USB lever.

1.3. production

So that the calculated data, the production Again in a certain shape (image, sound, etc.). In addition to the monitor, the most common output devices are also printers, speakers or projectors. The devices originally available for input can also be active again during the output. These include, for example, USB sticks and external rigid discs, of which the data can be read and also archived there.

On modern smartphones and tablets, on the other hand, the user causes the information edition on the screen through interaction (for example a tip of the finger or a gesture), whose evaluation is assessed via corresponding apps. The touchscreen combines the functions of the input and output device.

2 ° Example «writing letter»: here’s how the EVA principle works

The easiest way to illustrate the functionality of the Eva principle using an example is.

Suppose you want to write a letter to your insurance company or the tax office. To do this, start your PC or notebook first and call the text processing program installed on it. Enter the keyboard and provide an entire series of information to the system, including letters, line interruptions or corrections. Fonts and sizes are generally defined through the mouse or touchscreen.

The computer now processes the data entered and prepares you for the output on the screen. The archiving of the document on the hard drive is also a form of output.

After completion, your letter must be sent by e -mail or printed for the delivery of the mail. For this purpose, the system sends the relevant data to a printer connected directly to the computer via a USB cable or via a network interface (Ethernet or WLAN). At this point, the output process for the computer ends, while the input starts from the printer. The printer software now deals with the processing of information and also controls the parameters such as the amount of paper available or the status of the ink or toner.

3. Resolution of problems based on the EVA principle

The EVA principle provides for a correct construction of the hardware and software used and therefore can also be used for components tests and problems resolution and removal. To do this, it is verified because an input does not lead to the planned edition. Among other things, the consequences can be resolved, among other things,:

• Is the input device defective or the incorrect input leads to the deviation in the result?
• Are the calculation algorithms correct during processing or other files of files are required as a base?
• Is the type of output device suitable for desired output form?

Good to know: The memorizable controls (PLC), which are used to control and control machines and systems, also work according to the EVA principle.

4. The Eva principle outside the data processing

The Eva principle is general, which means that it is independent of electronics or technology also existed outside the data processing. It also includes people who process their respective data.

If data processing processes are transferred to a daily situation, the process may seem like this:

You will meet your neighbor on the street, who tells you about a friend.

• Die entrance It takes place through the sensory organs, in this case the eyes and ears, bring information and forward to the central nervous system.
• The brain is responsible Processing: Among other things, it guarantees the recognition effect or activates memory.
• The signals then reach the muscles on the nerves. Finally the productionFor example by lifting a hand to greet or above the mouth in the form of an answer.

Information: The Eva principle in computer science should not be confused with the book «The Eva principle». The bestseller of the former television presenter Eva Herman does not concern the processing of data, but the distribution of the roles of men and women in today’s society.