Computer Science

Computer hardware are the collection of all the physical or tangible parts that make up a computer system. In other word all the physical parts of computer which can be touched or felt are known as hardware. They are peripheral devices used in computer for specific purpose. Some examples of hardware are keyboard, mouse, monitor, CPU, ROM, RAM etc. Some computer hardware described below. Keyboard: Keyboard is an input device. It is set of typewriter like keys that enables user to enter data into a computer. Keyboard consist of set of alphabets (A-Z), digits (0,1,2,………9) symbols and functional and control key. When a key is press, an electrical signal produces and it is detect by electronic circuit called keyboard encoder and converted to binary code. Keyboard is also called QWERTY because f

Software is a collection of programs, procedures, and documentation that perform some task on a computer system. In other word software is a set of computer programs, procedures and associated documents for effective execution of the computer system.  Software consists of sequence of instructions written in computer understandable form. Different types of software are: system software, Operating system software, Application software, Utility software. System Software System software is a type of computer program that is designed to run a computer’s hardware and application In other word, system software is a set of program that manages and supports the resources and operations of a computer system. It is essential software which creates link between user and computer as well as provides a

Super Computer Super Computers are the most powerful and expensive computers in the world. They are multi-user, multiprocessor and multi-programming computers which are huge in size, have highest processing speed. Super computers are used to process large amount of data to solve the complex and complicated problems. A super computer can perform more than one trillion calculations per second. It has a large number of processors connected parallel, so thousands of users can work at the same time in a single super computer. These computers specially used in weather forecasting, aircraft and space engineering, scientific research etc. Some super computers are: CRAY -1, CRAY-2, CYBER 205, ETA-10 etc. Application areas of super computer: Super computer used in weather forecasting and climate...

The development of modern computers took place into five distinct phases on the basis of main component, the size, processing speed, cost, memory capacity etc used by them are known as generation of computer. Each generation computer is made improvements over the previous generation generations in terms of technology. The improvement in technology resulted in computer lower cost, high speed, and smaller size, greater memory capacity and more reliable. There are five generations of computer.  They are: First Generation Computer Second Generation Computer Third Generation Computer Fourth Generation Computer Fifth Generation Computer First Generation Computer First generation of computers was used during 1940-1956 A.D. which used vacuum tubes as the internal electronic components and m...

The development of modern computers took place into five distinct phases on the basis of main component, the size, processing speed, cost, memory capacity etc used by them are known as generation of computer. Each generation computer is made improvements over the previous generations in terms of technology. The improvement in technology resulted in computer lower cost, high speed, and smaller size, greater memory capacity and more reliable. There are five generations of computer.  They are: First Generation Computer Second Generation Computer Third Generation Computer Fourth Generation Computer Fifth Generation Computer Technologies used in different generation of computer are described below.  Vacuum Tube Vacuum tube is used in first generation of computers. A vacuu...

Computer technology made several important impacts on our society and life. Many activities in our daily life can be performed easily by using a computer. It has saved a lot of time, reduced cost and solved specific problems. Some common application areas of computer are described below: 1. Home: This is one of the major application fields of computer. Computers are playing a vital role at home, like other electronic devices such as television, radio, mobile phone, etc. Computers have also become the need of every person at home. Computers are used at home for writing a letter, listening to music, watching movies, drawing pictures, playing games, sending and getting email and information on the internet, keeping daily and monthly expenditure, and so on. Computers are also used at home as...

A computer is a powerful machine. it has the capability to do any jobs with very quickly as well as 100% accuracy. So it has own lots of characteristics. some of them described below. 1. High Speed: A computer can work at very high speed and is much faster than human. The operations on the data inside the computer are performed through the electronic circuits. The electronic circuit is designed in such a way that electrical signal travels at speed of light. A computer has the capability to do several complex calculations within a second. The time taken by the computer to perform an operation is called the processing speed. This processing speed of the computer is measured in MegaHertz (MHz) or GigaHertz (GHz) that is the speed of CPU. 1 Millisecond 1/1000th second 1 Microsecond...

A computer is an electronic machine that converts data into meaningful information by performing various actions on the data. A computer accepts the raw data from the user through input devices such as mouse keyboard etc processes them according to the given set of instructions, display the result as a human understandable form through an output device such as to monitor and printer, which called information and stores them for future references. Such operation performed by a computer is called the Information Processing Cycle or the basic working principle of the computer. The working principle of computer defined as below. “The basic working principle of a computer is a set of steps the computers follow to receive data, processes the data according to instructions, display the result t

A computer is one of the most powerful devices or machine in the ever developed in the world. It can process a large amount of data within a second. So it has some important terms, they are described below. Data: Data can e defined as any raw facts and figures or unprocessed mean need to be processed. Data can be figured out about a person, place, things, etc, which can be recorded and collected in the form of text, number, sound, image etc. Data itself do not give proper meaning without processing. For example ,the details of students (Roll No: 1, 2, 3, 4, Name : Dipak, Sabita, Messi, Ronaldo, Age: 20 , 23, 32, 35, Gender: male , female , Class: BBA, Msc, etc are data) . Above data can’t give exact meaning.  Processing:  The method or procedure of converting data into meaningful informat

This era is the technology era. We cannot imagine our life will be easier without technology. The most important technology in this era is the computer. A Computer is one of the most powerful and useful innovations in human history. Computer technology has brought tremendous effects in our daily life and enormous changes in the world. It has affected and reflected not only on the individual itself but also organization and society. With the use of the computer, people are suddenly able to perform an incredible amount of calculations at very high speed with almost 100% accuracy.  A computer plays a very important role to make human lives easier. It is becoming a fundamental need in our day to day regular activities. In this century, our life will be incomplete without the use of this wonder