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Slide 1 - COMPUTER BASICS Presented by SERT IT CAMPUS CHENGANNUR  Excellence in Education SERT IT CAMPUS
Slide 2 - INTRODUCTION Computers have touched every part of our lives: the way we work, the way we learn, the way we live, even the way we play. It almost is impossible to go through a single day without encountering a computer or a device dependent on a computer or information produced by a computer. Because of the significance of computers in today‘s world, it is important to be computer literate SERT IT CAMPUS
Slide 3 - What is mean by computer? A computer is a fast electronic device that processes the input data according to the instructions given by the programmer / user and provides the desired information as an output. SERT IT CAMPUS
Slide 4 - Data And Information Data is a collection of raw unprocessed facts, figures, and symbols. Information is data that is organized, meaningful, and useful. To process data into information, a computer uses hardware and software. SERT IT CAMPUS
Slide 5 - Working Principle of Computer Computer is an electronic device that accepts the input, process the data and produces the output. SERT IT CAMPUS
Slide 6 - INPUT Input : Input is the raw information (Data) entered into a computer from the input devices. It is the collection of letters, numbers, images etc. Process: Process is the operation on the data as per the given instruction. It is totally internal process of the computer system. Output : Output is the processed data given by computer after data processing. Output is also called as Result. We can save these results in the storage devices for the future use. SERT IT CAMPUS
Slide 7 - Computer Classification: By Size and Power Computers are generally classified by size and power as follows. The differences between computer classifications generally get smaller as technology advances, creating smaller and more powerful and cost-friendly components. SERT IT CAMPUS
Slide 8 - Personal computer: a small, single-user computer based on a microprocessor. In addition to the microprocessor, a personal computer has a keyboard for entering data, a monitor for displaying information, and a storage device for saving data. SERT IT CAMPUS
Slide 9 - Workstation Powerful, single-user computer. like a personal computer more powerful microprocessor higher-quality monitor. SERT IT CAMPUS
Slide 10 - Minicomputer Minicomputer: a multi-user computer capable of supporting from 10 to hundreds of users simultaneously. A minicomputer fills the space between the mainframe and microcomputer. Smaller than the former but larger than the latter. Minicomputers are more powerful than personal computers and workstations. SERT IT CAMPUS
Slide 11 - Super computers Super computer is an extremely fast computer that can perform hundreds of millions of instructions per second. A supercomputer is a computer with a high level of performance compared to a general-purpose computer.  SERT IT CAMPUS
Slide 12 - Characteristics of computers Speed: - As you know computer can work very fast. It takes only few seconds for calculations that we take hours to complete. Accuracy: - The degree of accuracy of computer is very high and every calculation is performed with the same accuracy. Diligence: - A computer is free from tiredness, lack of concentration, fatigue, etc. It can work for hours without creating any error.     SERT IT CAMPUS
Slide 13 - Versatility: - It means the capacity to perform completely different type of work. You may use your computer to prepare payroll slips. Next moment you may use it for inventory management or to prepare electric bills. Power of Remembering: - Computer has the power of storing any amount of information or data. Any information can be stored and recalled as long as you require it, for any numbers of years. No IQ: - Computer is a dumb machine and it cannot do any work without instruction from the user. It is you to decide what you want to do and in what sequence. So a computer cannot take its own decision as you can. SERT IT CAMPUS
Slide 14 - No Feeling: - It does not have feelings or emotion, taste, knowledge and experience. Thus it does not get tired even after long hours of work. Storage: - The Computer has an in-built memory where it can store a large amount of data. You can also store data in secondary storage devices such as floppies, which can be kept outside your computer and can be carried to other computers. SERT IT CAMPUS
Slide 15 - ELEMENTS OF COMPUTER SYSTEMS A computer system setup consists of five elements : i. Hardware ii. Software iii. People iv. Data v. Connectivity. SERT IT CAMPUS
Slide 16 - i. Hardware The physical components of a computer Hardware consists of input devices and output devices that make a complete computer system. Examples : Keyboard Optical scanner Mouse Joystick Monitor printer SERT IT CAMPUS
Slide 17 - ii. Software A set of programs that form an interface between the hardware and the user of a computer system are referred to as Software. They are of two types of software: System Software Application Software SERT IT CAMPUS
Slide 18 - System software A set of programs to control the internal operations of the computer such as reading data from input devices, giving results to output devices and ensuring(confirm) proper functioning of components is called system software. SERT IT CAMPUS
Slide 19 - Example for system software are: 1. Operating system A set of tools and programs to manage the overall working of a computer using a defined set of hardware components is called an operating system. It is the interface between the user and the computer system. 2. Utility software Certain special purpose programs that are designed to perform a specialized task, such as functions to copy, cut or paste files in a computer, formatting a disk etc. SERT IT CAMPUS
Slide 20 - 3. Language processors It‘s system software that accepts data in high level language (user understandable language) and interprets it to Machine /Assembly language (understandable by a computer). 4. Connectivity software A set of programs and instructions to connect the computer with the network to enable sharing of resources and information with the server and other connected computers. SERT IT CAMPUS
Slide 21 - Application software Application software includes programs that user‘s access to carry out work. They include applications for the following functions.  Word processing is the most common applications software. The great advantage of word processing over using a typewriter is that you can make changes without retyping the entire document.  Spreadsheets are computer programs that let people electronically create and manipulate spreadsheets (tables of values arranged in rows and columns with predefined relationships to each other). Spreadsheets are used for mathematical calculations such as accounts, budgets, analysis and so on. SERT IT CAMPUS
Slide 22 -  Database management applications are computer programs that let people create and manipulate data in a database. A database is a collection of related information that can be manipulated and used to sort information, generate reports.  Presentation packages and graphics are computer programs that enable users to create highly stylised images for slide presentations and reports. They can also be used to produce various types of charts and graphs.  Communications applications typically include software to enable people to send faxes and emails and dial into other computers. SERT IT CAMPUS
Slide 23 - iii. People The most important element of a computer system is its users. The following types of people interact with a computer system: System Analysts: Person who designs the operation and processing of the system. (b) System Programmers: People who write codes and programs to implement the working of the system. (c) System Operators/ End users: People who operates the system and use it for different purposes. SERT IT CAMPUS
Slide 24 - (iv) Data The facts and figures that are fed into a computer for further processing are called data. Processed and useful data is called information which is used for decision making. SERT IT CAMPUS
Slide 25 - (v) Connectivity: When two or more computers are connected to each other. They can share information and resources such as sharing of files (data/music etc.), sharing of printer, sharing of facilities like the internet etc. This sharing is possible using wires, cables, satellite, etc.... SERT IT CAMPUS