Presentation comparative analysis of PC functionality. Presentation on the topic "classification of computers"

Publication date: 11.07.2016

Short description:

CLASSIFICATION OF COMPUTER DEVICES Prepared by: teacher of computer science and ICT MBOU secondary school No. 37 Krasnodar Solodukhina E.A.

Input Devices Keyboard Pointing Mouse Trackball Touchpad Graphic Tablet Joysticks Digital and Web Camera Scanner

Storage devices Floppy disk Discs (CD-R, CD-RW, DVD-R, DVD-RW) Volatile memory cards Flash card

Computer Monitor Peripherals Printer Scanner Modem Webcam System unit Motherboard RAM HDD HDD Sound card LAN card Video card Central processing unit Power supply Cooling system Control devices Mouse Keyboard Joystick

The system unit, the main part of the computer, where all computing processes take place. The system unit is quite complex and consists of various components.

The main input device of the majority computer systems is the keyboard. The keyboard in one form or another is likely to remain the main input device, even despite the development of speech recognition technologies. The keyboard is a set of mechanical sensors that perceive pressure on the keys and close in one way or another a certain electrical circuit. The basic principle of the keyboard is to scan the key switches, and the closing or opening of any of them corresponds to its own unique digital code.

Modern keyboards have from 101 to 105 keys for various purposes: Alphanumeric or character keys for entering letters of the English and national alphabets, as well as numbers and various symbols, Service keys (Enter, Tab, Esc, Insert, Delete and others) for performing certain actions, for example, to finish entering text, delete a character, etc., Cursor keys (Home, End, PageUp, PageDown), Control keys (Shift, Ctrl, Alt), pressed in combination with other keys and changing their value, Function keys(F1 to F12) used to access certain functions in various programs, Keypad used to quickly enter numbers and perform mathematical operations. Cursor keys

In the optical-mechanical mouse manipulator, the main working body is a massive ball (metal, covered with rubber), the rotation of which is converted into the movement of the mouse pointer on the monitor screen. At present, optical mice are widely used, in which a light source placed inside the mouse illuminates the surface, and the reflected light is captured and converted into movement of the mouse pointer on the screen. The mouse usually has two control buttons, which are used when working with the graphical interface of programs. Currently, mice have appeared with an additional wheel, which is located between the buttons. It is designed to scroll up or down images and texts that do not fit entirely on the screen.

A trackball is not much different from a mouse. In essence, it is the same mouse, but turned upside down, more precisely, turned upside down with a ball. If you need to move the mouse around the table and, while rolling the ball, control the movement of the marker on the screen, then in the trackball you just need to twist the ball itself in different directions with your fingers or palm. In laptop computers, the trackball is often built right next to the keyboard, or clipped onto the side or front of the computer keyboard. However, keyboards with a built-in trackball are also available for desktop computers. And in the most portable computers, instead of a mouse and a trackball, they now use a tiny pointer - a small colored pin sticking out among the keys on the keyboard, which, like a joystick, can be pressed in different directions.

Touchpad - a surface that can recognize touches on it. A controller is supplied with the surface, which converts them into digital signal understood by a conventional computer. The uniqueness of the idea touch panel allows you to install the device in three steps: Overlaying the touch panel on conventional monitor, Connecting the controller connected to touch glass, to the computer, Installing the driver for the operating system. But most often touch panels are used on portable computers. With convenience, reliability and a variety of applications, sensor technologies help people in everyday life: work, study and leisure. This technology is designed for experienced users, and for people who are unfamiliar with computer technology. The input of information by touch is simple and natural, so the operation of the touch screen does not require training. An intuitive communication system eliminates the occurrence of errors, and the instant response of the impact on touch screen in some cases is the determining factor in the choice of equipment.

At present, the infrared touch panel is widely used. Advantages of infrared technology: Durability. All components (line of light and photodiodes) are located in the display frame. Unlike resistive and capacitive technologies, IR touch displays do not use fragile translucent touch coatings. Scratches, dirt, and even cracks do not affect the functionality of the touchpad. No calibration required. Calibration stability is based on 100% digital positioning. It is controlled by any opaque object - a pencil, a gloved hand. Quality image. No conductive coatings on glass.

Joystick - an information input device made in the form of a control handle, shaped like a car speed switch or an airplane steering wheel. The joystick is mainly used for computer games.

Another input device graphic information in a computer is an optical scanning device, commonly referred to as a scanner. The scanner is the eyes of the computer. Initially, they were created specifically for entering graphic images, drawings, photographs, drawings, diagrams, graphs, diagrams. The quality of the scanned image obtained depends on the type of scanner. However, in addition to graphics input, they are now increasingly used in fairly complex intelligent systems OCD or Optical Character Recognition, that is, optical character recognition. These smart systems allow you to enter into the computer and read the text. Scanners come in various designs: Handheld, Flatbed, Drum, Projection.

Monitor is universal device information output. IN desktop computers CRT monitors are commonly used, which can be a source of radiation harmful to humans. Modern monitors comply with strict sanitary and hygienic requirements and do not adversely affect human health.

In portable and handheld computers, flat-panel monitors on liquid crystals are used. Recently, such monitors have been used in desktop computers. The advantage of liquid crystal monitors is their compactness and the absence of radiation. Information on the monitor screen is presented in the form of a raster image, which is formed from individual points(pixels). Bitmap consists of a certain number of lines, which in turn contain a certain amount of points

Printers are designed to output to paper (create a hard copy) of numerical, textual and graphic information. According to the principle of operation, printers are divided into: Dot-matrix, Inkjet, Laser.

The hard disk is used for long-term storage of information, it contains the programs necessary for the operation of the computer (Windows, Office, Internet Explorer.) and user files (Mail files, if used mail client, video, music, pictures.).

Video card-board inside system block, designed to connect the system unit and the monitor, transmits the image to the monitor and takes over part of the calculations for preparing the image for the monitor. Image quality depends on the video card. The video card has its own built-in RAM and its own image processing processor. The higher the frequency of the processor of the video card and the more memory of the video card, the more cool (later released) games you can play on your computer.

Sound card - designed to prepare sound signals reproduced by speakers. The sound card is usually built into motherboard, but it can also be structurally separated and connected via a bus.

A network card is a board, a device that is installed in the motherboard or built into it. A network card is used to connect a computer to other computers via local network or to connect to the Internet.

CD / DVD-ROM - a device for reading / writing CDs, CDs, DVDs. These devices differ in the speed of reading or writing information, as well as the ability to read / write various media. It's hard to find anything other than omnivorous CD-ROMs on the market these days. Modern CD-ROMs are capable of reading and writing both CDs and DVDs of various capacities.

http://www.mkgt.ru/files/material-static/138/contents.htm

PCs and workstations

Servers

Mainframes

Cluster architectures

To software terminology

Program

Software

Software Tool

Software package

A program is a complete product that can be run by its author on the system on which it was developed.

Software - a program that anyone can run, test, fix and develop. Such a program should be written in a generalized style, thoroughly tested, and accompanied by detailed documentation.

Such definitions are located, for example, at http://mf.grsu.by/Kafedry/kaf001/academic_process/048/28

SUMMARY OF THE REVIEW LECTURE. For students of the specialty

T1002 " Software information technologies» (A.M.Kadan, Ph.D., Associate Professor)

Software tool is a program or a logically related set of programs on data carriers, provided with program documentation.

Software package - a set of interacting programs, consistent in functions and formats, well-defined interfaces, and together complete remedy for big tasks.

GOST 19781-90 SOFTWARE FOR INFORMATION PROCESSING SYSTEMS Terms and definitions

Software of data processing systems. Terms and definitions

Program (Program) - data intended to control specific components of the information processing system in order to implement a specific algorithm

Program (en program): - see GOST 19781.

Software product (en software product: Software intended to be delivered,

transfer, sale to the user.

GOST 28806-90 SOFTWARE QUALITY Terms and definitions

software quality. Terms and definitions

software tool; PS (en software):

An entity consisting of programs, procedures, rules, and, where applicable, associated documentation and data relating to the operation of an information processing system.

Note. A software tool is specific information that objectively exists as a set of all properties of each of the material objects that are significant from the point of view of its representation, containing this information in a fixed form.

Glossary (glossary.ru)

Software product- a program or a logically related set of programs:

- recorded on data carriers;

- being a product of industrial production;

- supplied with program documentation;

Intended for wide distribution through sale or through freeware, shareware, or OEM methods.

Software package- a set of interacting programs:

- agreed on functions and formats;

- having uniform, well-defined interfaces; constituting a complete tool for solving large problems.

Computers can be classified according to various criteria, for example, by size, by application, by speed, by functions performed, by stages of their creation, etc. In this presentation, we will consider a classification according to a generalized criterion, where several characteristic features:

Parameters Large computers Small computers Productivity (million op/s) 1000 – Volume random access memory(MB) Volume external memory(GB) , Bit depth (bit) 64; 12816; 32; 64

SERVERS A SERVER is a powerful computer used in computer networks, which provides maintenance of computers connected to it and access to other networks. The server stores large amounts of information that other computers connected to it use. The server is subject to increased requirements for speed and reliability. It should provide for the possibility of backing up all stored information. Preventive and repair work should be carried out without stopping it and turning off other computers.

CHARACTERISTICS "Friendliness" of the interface of human interaction with a computer Low cost Small dimensions Open architecture Large number software tools For various areas applications Compatibility of new versions and models High reliability of work

Generalized characteristics personal computers Parameters Type of microprocessor PentiumPentium Pro Clock frequency (MHz) 60 – – 600 RAM size (MB) 8, 16, 32 16, 32, 64, 128 Size hard drive(GB) 1 - 102 - 16 Cache size (KB) 512, 1024, 2048 Bit depth (bits) 32
PORTABLE COMPUTER The name comes from the Latin porto - "carry" and means that they are easy to carry from place to place. Their weight ranges from 0.2 to 6 kg. Usually they are designed in the form of suitcases or folders and, in turn, are divided into several types: 1. laptop 2. organizer - electronic Notebook

Are intended for use in production conditions. They are integrated into the technological process of production of any product, they control production lines and machines. With their help, they control planes, trains, conduct research and test new instruments, mechanisms, and devices. They are subject to increased requirements for reliability, resistance to various fluctuations in parameters environment(temperature, vibration, dust, etc.)

Control questions and tasks 1. Describe the class of personal computers. 2. Give the main characteristics of a personal computer. 3. What characteristics of a portable computer are essential for a user and why? 4.What affects the price of a computer the most? 5.What are the specifications laptop computers You know? 6.Tell us about the purpose of organizers and notebooks. 7. How do you imagine an industrial computer?

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All computers are divided into large and small

The class of large computers is made up of systems that have great computing power and are designed to serve several users at the same time. In turn, small computers are designed to assist a person in everyday work with current information.

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Large computers are divided into

Supercomputers - possessing enormous computing power, based on the multiprocessor principle of information processing. As a rule, such machines are produced in single copies and are used in areas where fast analysis of large information flows is required.

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Servers - powerful computers in computer networks that service computers connected to them, provide their resources for use by other users and provide access to other networks. Often servers specialize in servicing workstations in a particular area. Depending on the purpose, the following types of servers are defined: application server, file server, archive server, fax server, mail server, print server, teleconferencing server.

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Small computers are classified into

Personal. The main purpose is to perform routine work: searching for information, compiling standard forms of documentation, preparing various kinds of texts, etc. The general availability and versatility of personal computers is ensured by the presence of the following characteristics: user-friendliness of the human interaction interface, low cost, small dimensions and the absence of special requirements for environmental conditions, openness of architecture, a large number of software tools for various applications, high reliability.

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Portable. These computers are easily portable. They are often designed in the form of suitcases or folders.

Slide 7

Production. Are intended for use in production conditions. They are integrated into the technological process of production of some products, they control production lines and machines.

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