Scanner is the input device which helps to convert a hard copy data into a soft copy data and send them to the computer. All scanners work on the same principle of reflectance or transmission. The image is placed before…
Urbanization: An Important but Risky Process
In this modern age, the process of urbanization is also growing along with the process of industrial development. Urbanization can simply be defined as the act of establishing urban areas by substituting the rural areas. A country can be divided…
The Computer Mouse – A Small but Complicated World
A mouse can defined as a hardware device which is used for providing input to the computer. It is a mouse-like device which allows the user to control the cursor the manipulate data without the use of complicated commands. Types…
Concept of Sustainable Development
United Nations General Assembly formed a World Commission on Environment and Development under the chairmanship of Norwegian Prime Minister Grow Harlem Brundtland to suggest the world on Environment and Development in 1983. The commission is called “Brundtland Commission”. The Commission…
Understanding A Computer Keyboard
Keyboards are one of the most important input devices which are used in feeding input to computers. They are designed for the input of texts and characters, and also to control the operation of the computers. The most common and…
Methods for Purification of Water
Methods for Purification of Water Purification of water is a process of removing undesirable chemicals, materials and biological contaminants from contaminated water. The goal is to produce water fit for a specific purpose. Most water is purified for human consumption…
Sources of Waste Water and Waste Water Management
Waste Water Management Water management is the field of handling waste water, to make it suitable to either be recycles into a water system or to be disposed of in an environmentally- conscious manner. Waste water management is one of…
Principle of Solid Waste Management
Principle of Solid Waste Management Improper disposal of solid wastes leads to various environmental and health hazards. To minimize such solid wastes are to be properly managed at their sources. The management of solid waste has become very difficult in…
Auxiliary Storage Devices
Auxiliary storage devices are also referred to as auxiliary memory or secondary memory. These devices supplement the main storage. Auxiliary storage devices are long term, non-volatile memory. Unlike RAM, it allows the computer to record information in semi-permanent way. Due…
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