Normally, computers are categorized on the basis of size, speed, processing power and price. However, categorizing computers is not very straight-forward. The distinction between these categories is sometimes not very clear. Sone characteristics overlap different categories. Computers can be divided into the following categories: Personal Computers / Micro Computers Personal computer is a type of … Read more
Different generations of the computer are as follows: First Generation Computers (1942-1955) The beginning of commercial computer age is from UNIVAC (Universal Automatic Computer). It was developed by the Census Department of United States and developed by two scientists MAUCHLY and ECKERT in 1947. First-generation computers were used during 1942-1955. They were based on vacuum … Read more
The computer was invented because “necessity is the mother of invention”. Man always searched for a fast calculating device. It took a long time to invent a digital computer. A brief history behind the invention of the computer is as follows: Abacus The first computing device was ABACUS. It was developed in 600 B.C. It … Read more
Following are the important characteristics of a computer: 1. Speed Computers work at a very high speed and are much faster than humans. A second is very large time period time for computer. A computer can perform billions of calculations in a second. The time used by a computer to perform an operation is called … Read more
Different components of a computer system are as follows: Input Devices A hardware component used to enter data and instruction into a computer is called an input device. Most commonly used input devices are a keyboard, mouse, microphone, scanner, digital camera and PC camera. Keyboard: Keyboard is used to enter text. It contains alphabetic, numeric … Read more
The processed data is called information. Information is an organized and processed form of data. It is more meaningful than data and is used for making decisions. Data is used as input for the processing and information is the output of this processing. This information can be used again in some other processing and will … Read more
A computer is a machine that can be programmed to accept data, process data into useful information and store it for later use. A computer consists of hardware and software. The machine is known as hardware. The programs are called software. The processing of input to output is directed by the software but performed by … Read more
A collection of raw facts and figures is called data. The word raw means that the facts have not yet been processed to get their exact meaning. Data is collected from different sources. It is collected for different purposes. Data may consist of numbers, characters, symbols or pictures, etc. Data is a vital resource for … Read more
