Vitamins-Sources and Deficiency Diseases

Vitamins-Sources and Deficiency Diseases: Vitamins- Vitamins as the name suggest are vital minerals for life. These are organic compounds which are essential for normal metabolism of body cell though they neither supply energy nor serve as a building material. Vitamin free diet causes certain diseases and may even cause death. These are not synthesised by the …

Soil Erosion & Soil Conservation Measures

Soil Erosion & Soil Conservation Measures: What is Soil? The surface material covering much of the earth, composed of the minerals, particles, humus, water, air, in which plants can grow is called soil. It is the loose material forming the upper layer of the earth’s crust. It is formed slowly over a longer period by chemical …

Structured Programming- Advantages and Disadvantages

Structured Programming: In structured programming design, programs are broken into functions (also known as modules, subprograms, subroutines, or procedures). Each function is designed to do a specific task with its own data and logic. Information can be passed from one function to another function through parameters. A function can have local data that cannot be accessed …

Object-Oriented Programming (OOP)

Object-Oriented Programming: The evolution of the object-oriented programming approach is cited with the overcome of several flaws in the existing procedural-oriented programming methodology. The OOp or the nonprocedural programming approach activates data as a critical element in the programming modulation and does not allow it to move freely around the system. It allows the decomposition of …

Applications of Computer

Applications of Computer: In 1950s, computers were giant, special-purpose machines that were used by huge institutions like governments and universities. And they were used for performing complex numerical tasks such as calculating the precise orbit of Mars or planning the trajectories of missiles etc. In 1960s, business world started using computers for commercial purposes. In 1970s, …

Characteristics of Computer

Characteristics of Computer: The human race developed computers so that they could perform intricate operations, such as calculation and data processing, or simply for entertainment. Today, much of the world’s infrastructure runs on computers and it has profoundly changed our lives, mostly for the better. The various characteristics of computers, which make them an essential part …

Secondary Storage Devices

Secondary Storage Devices: A computer is capable of storing the bulk of data and retrieving are assessing the stored data as and when required. A personal computer may store a few thousand of characters whereas a mainframe may store a billion of characters. The bulk of data can’t be stored in the main memory as this …

Computer Memory

Computer Memory: An essential component of every computer is its memory. Without memory, there could be no computers as we know them. Memory refers to the part of the computer system where instructions and data are stored. Units of Memory: Unit Description Nibble 1 nibble is a combination of 4 bits. Bit A binary digit, 0 …

Computer Output Devices

Computer Output Devices: An output device is a device that accepts results from the computer and displays them to the user. The output device also converts the binary code obtained from the computer into a human-readable form. The principal kinds of output are hard copy and soft copy. Types of Output Devices: Type Examples Soft Copy …

Computer Input Devices

Computer Input Devices: Input devices allow users and other applications to input data into the computer, for processing. Input devices are classified as follows- (1) Human Data Entry Devices: (i) Keyboard.(ii) Pointing Devices- Mouse, Joystick, Trackball, Digitizing Tablet, Light Pen, Touch Screen. (2) Source Data Entry Devices: (i) Audio input- Speech Recognition.(ii) Video input- Digital Camera.(iii) …

Computer Software and Hardware

Computer Software and Hardware: What is Software? Software is an internal set of programs that are designed to perform a well-defined function. The software is created by grouping various related programs. A program is a sequence of instructions written to solve a particular problem. The programs are created in computer programming languages. These software is created …

Basic Components of Computer System

What is a Computer? The term computer is taken from the word compute which means to calculate. A computer is an electronic device, widely used for calculations and controlling operations that can be expressed either in logical or numerical terms. In other words, a computer is an electronic device that can perform a variety of operations …