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A keyboard is a device for manually entering information into a computer. Modern types of keyboards differ, basically, the principle of signal formation when you press a key. The most common keyboards have under each key a dome made of special rubber, which bends when the key is pressed and closes the contacts with a conductive layer located on the dome...

To work with data of various kinds, it is necessary to unify the form of their representation, and this allows to make coding. Coding we deal with quite often, for example, people think very vague concepts, and to convey the idea from one person to another, language is used. Language is a system of coding concepts...

The principle of the stored program is considered to be the most important idea of computer architecture and, as some scientists claim, the only one that caused the second industrial revolution in the second half of the 20th century. This idea is that, firstly, the computation program is entered into a computer and stored in the same memory...

All modern computer programs are processes can perform simultaneously and several at once. So, simultaneously with the process program running by the user, the program can read from the disk and display text on the monitor or printer. In a multitasking system, the processor switches between process programs, providing each from tens to hundreds of milliseconds...

In normal operating systems, the process is determined by the appropriate address space and a single control flow. The process model is based on two independent concepts: grouping resources and executing the program. When they are shared, there is such a thing as threads...

Different methods are used to recognize images. One of the simplest methods is the method of masks. The masks method is to compare the recognized image with several specially selected images - masks, that is, in finding the mask with which the image is most similar. The magnitude characterizing the similarity is measured by projecting the recognized...