Introduction to Computer. Computer. A computer is an electronic device, operating under Any kind of computers consists of HARDWARE AND SOFTWARE. ACHARYA AGRICULTURAL UNIVERSITY. LECTURE NOTES. Course No: STCA Introduction to Computer Applications. Prepared by. Chapter 1 Introduction to Computers. A World of Computers. Computers are to sending simple notes, people use computers to share photos, drawings.

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one have been using the computer for a while.) You will see a login-prompt at which you have to write your user-name and you will be asked for your password. Introduction to computers. 1. Introduction To Computer Hardware. You will learn common technical specifications. Slide # 2. Technical. Introduction to. Computers. Chapter 1 Objectives. Explain the importance of computer literacy. Define the term computer. Identify the components of a computer.

It forms images from tiny dots, called pixels that are arranged in a rectangular form. The sharpness of the image depends upon the number of pixels. D Printer Printer is an output device, which is used to print information on paper. Impact Printers: The impact printers print the characters by striking them on the ribbon which is then pressed on the paper.

Non-Impact Printers: Non-impact printers print the characters without using ribbon.

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These printers print a complete page at a time so they are also called as Page Printers. Laser Printers, Inkjet Printers.

E Joy Stick It is a device used to move cursor position on a monitor screen. F Scanner A scanner allows you to scan printed material and convert it into a file format that may be used within the PC.

G Plotter A plotter is used to create high-quality visuals on paper. A plotter gives a hard copy of the output. It draws pictures on a paper using a pen.

It can be used to create presentation-charts, graphics, tables and high quality technical drawings. There are two types of plotter. Drum Plotter: The paper is placed over the drum that rotates back and forth.

A carriage holding one or more pens is mounted horizontally across the drum. The carriage with the pens moves horizontally over the paper. Each pen could be filled with different colours. This plotter has the ability to produce colour pictures. Flat Bed Plotter: In flat bed plotter, the paper does not move. The carriage holding the pens should provide all motions.

Introduction to Computers

Inkjet plotters can also produce large drawings with different colours. Liked these Basic Computer Hardware Notes? Read more Computer notes!

An inaccurate result can only be due to incorrect input by a human. Computer errors caused due to incorrect input data are referred to as garbage-in-garbage out.

Diligence — A computer is free from monotony or fatigue. It can work continuously for hours with the same level of accuracy and efficiency. Versatility — It performs a variety of arithmetic, non-arithmetic and logical operations at high speed.

Storage or memory — It can store huge amounts of data which can be retrieved any time as and when desired by the user. Therefore it cannot give bias results and cannot take an action on its own. Components of a Computer: People: Humans who operate the computer and feed instructions.

Data: Raw facts or figures that are fed to the computer as input by the user. Hardware: The physical components which can be felt and touched in a computer.

Software: It refers to set of instructions or programs that are fed by the user to the computer system to get desired output. An input device accepts the instructions and data from the user, converts it into computer acceptable form and then supplies the converted data back to the computer system for further processing.

Keyboard, Mouse, Camera, Touchscreen etc. Output devices supply information to the user in variety of forms. It may be binary numbers, characters, text, images or videos. An output unit converts the processed input data into human readable form and displays results as and when desired by the user. Monitor, Printer, Projectors etc. Parallelism has long employed in high-performance supercomputing. Grid computing is a group of computers physically connected over a network or with Internet to perform a dedicated tasks together, such as analysing e-commerce data and solve a complex problem.

Grids are a form of "super virtual computer " that solve a particular application. The grid size may vary from small to large enterprises network. A computing grid is constructed with the help of grid middleware software that allows them to communicate.

It is the form of "distributed computing" or "peer-to-peer computing". So the answer depends on different classification of computers. Computer has making human life faster because of its incredible speed,Accuracy and storage, with which human can save anything and search it out easily when needed.

We can say computer a versatile machine because it is very flexible in performing their jobs. In s, Computer term was first used as " one who calculates. From the term indicates as " programmable digital electronic computer ".

Definition of term is that, it is used for processor, Operating System, install a game, computer driver etc. Cloud Computing Definition is that it is a shared pool of configurable computing resource eg. Cloud computing literally, is the use of remote servers usually accessible via the Internet to process or store information.

Access is usually using a Web browser.

Save files on a server via the Internet is one example. Computers internal architectural design comes in different types and sizes, but the basic structure remains same of all computer systems.

The term ' computer hardware ' or 'computer parts' is used to describe computer components that can be seen and touched. Devices that are not integral part of CPU referred to as peripherals.

Computer System – Introduction

During the last decade computers have become an integral part of our daily lives. There is hardly any activity which does not make use of computers at some stage or the other. Similarly, on any given day, even if we are not directly working on computers on our desks, we make use of computers many times while using a mobile or a land line phone, downloading from a modem outlet, and other such activities.

Facilities such as e-mail and web have become the life-line of our modem society as well as of the world of business. A supercomputer is the fastest computer in the world that can process a significant amount of data very quickly. The computing Performance of a "supercomputer" is measured very high as compared to a general purpose computer. The supercomputer consists of tens of thousands of processors which can perform billions and trillions of calculations per second, or you can say that supercomputers can deliver up to nearly a hundred quadrillions of FLOPS.

A minicomputer is also known as mini. It is a class of small computers that was introduced into the world in the mids. A minicomputer is a computer which has all the features of a large size computer, but its size is smaller than those.

A minicomputer lies between the mainframe and the microcomputer because its size is smaller than the former one and larger than the latter one. A minicomputer is also called as a mid-range computer. Minicomputers are mainly multi-users systems where more than one user can work simultaneously.

Mini computer examples: Micro Computer is a small computer. Your personal computer s are equivalent to the microcomputer.Your personal computer s are equivalent to the microcomputer. A docking station typically includes standard expansion slots, as well as additional ports sockets or connection interfaces for connecting a local printer , modem, keyboard, larger storage or backup drives etc. NetBook - What is netbook? Access is usually using a Web browser. What is Parallel Computing?

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