Similarities and Difference between Human and Computer

Computer is a very effective and efficient machine which performs several activities in few minutes, which otherwise would have taken several days if performed naturally. Besides there would have been a doubt about the accuracy, finish etc. The computer may be faster; more accurate but it cannot compete with human brain. However there are some similarities between the human and the computer which would make the computer more understandable. Human…

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Classification of Computers

Computers are broadly classified into two categories depending upon the logic used in their design as: Analog computers In analog computers, data is recognized as a continuous measurement of a physical property like voltage, speed, pressure etc. Readings on a dial or graphs are obtained as the output, ex. Voltage, temperature; pressure can be measured in this way. Digital Computers These are high speed electronic devices. These devices are programmable.…

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Popular search Engines/Searching for Content

The top five search engines are: 1. Google Search 2. Bing! Search 3. Yahoo! Search4. Baidu! Search5. Ask.com Search To understand and appreciate why the search engines have gained popularity, let us know the basic working of Internet search engines. There’s loads of information available on the World Wide Web, but how do we get the exact info we require? The answer to this Internet search engines. These are special…

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Components of Computer Hardware

The computer system hardware comprises of three main components — 1. Input/Output (I/O) Unit, 2. Central Processing Unit (CPU), and 3. Memory Unit. The I/O unit consists of the input unit and the output unit. CPU performs calculations and processing on the input data, to generate the output. The memory unit is used to store the data, the instructions and the output information. The typical interaction among the different components…

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Generations of Computer

The computer has evolved from a large—sized simple calculating machine to a smaller but much more powerful machine. The evolution of computer to the current state is defined in terms of the generations of computer. Each generation of computer is designed based on a new technological development, resulting in better, cheaper and smaller computers that are more powerful, faster and efficient than their predecessors. Currently, there are five generations of…

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What is a Computer?

A Computer is a group of electronic devices used to process data. In the 1950s, computers were massive, special–purpose machines that only huge institutions such as governments and universities could afford. Primarily, these early computers performed complex numerical tasks, such as calculating the precise orbit of Mars or planning the trajectories of missiles or processing statistics for the Bureau of the census. Although computers were certainly useful for tasks like…

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Components of Computer System

Computer system is made up of a number of components. These are 1. Input devices 2. Memory unit 3. Central processing unit 4. Output devices Central Processing Unit (CPU) The central processing unit (CPU) is where the actual processing takes place. This is where the calculations are performed and logical functions are carried out. The CPU retrieves its data and instructions from the main memory, processes the data according to…

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Basic Applications of Computer

Computer derives its name from the word Compute that means calculation. It can be said that Computer is a device used for calculation. Nowadays Computer is not only limited to computation, but also used for making phone calls, maintaining databases, listening songs, viewing movies etc, so a more formal definition of Computer is required. Computer is an electronic device that processes or transforms data into useful information by executing a…

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Introduction to Data Visualizations with D3.js

In this chapter, we introduce the field of data visualization. We will see why we need data visualizations and how we can use the Web to distribute them to achieve our communication goals. We understand why D3.js is the de facto standard for data visualizations in the browser. We review the origins of the library, why it is so powerful and web focused. Also, we learn about the latest updates…

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Advantages and Disadvantages of Computers

Advantages of Computers Speed The speed of a computer is measured in terms of the number of instructions that it can perform or execute in a second. The speeds of computers are measured in milli­seconds (10~3 sec), micro-seconds (10*6 sec), and nano-seconds (10~9sec). Computers are superfast machines and can process millions of instructions per second. Smaller computers can execute thousands of instructions per second, while the more complex machines can…

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