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Mahmood Alam - Founder of www.computergap.com

( www.computergap.com / www.forfreeeducation.blogspot.com )

I am Mahmood Alam, the founder of this blog : www.computergap.com / www.forfreeeducation.blogspot.com. I am an Instructor by profession and a part time blogger. I am not able to give much time to blogging because of my job. This blog is another place to share knowledge. Two of my students also help keep this blog updated. Thanks nice guys! Keep it up!

www.computergap.com / www.forfreeeducation.blogspot.com is a free source of perfect computer notes to decrease the computer gap and spread computer science knowledge and information technology skills. We work to spread computer literacy - free computer science education for all.

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( www.computergap.com / www.forfreeeducation.blogspot.com )

You may contact us at softalogy@gmail.com for any queries, suggestions, complaints etc. Thanks for coming here on www.computergap.com / www.forfreeeducation.blogspot.com.

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Explain different types of storage devices

Topic: Explain different types of storage devices in Computer systems Storage Devices Storage devices are used to store data and instructions permanently. Storage devices are also called secondary storage devices / backing storage devices / external storage devices or auxiliary storage devices. Examples of storage devices include Hard Disk, CD and DVD etc. Why Secondary Storage Devices are Used? Secondary storage devices are used because: Primary memory(RAM) is volatile and temporary. When computer is switched off, all data in ram is erased. Storage devices can store large amounts of data and instructions permanently whereas Primary memory has less capacity of storing data. Types Of Storage Devices There are three main types of storage devices: Magnetic Tape Magnetic Disk Optical Disk Flash Memory storage devices 1. Magnetic Tape Magnetic tape is the oldest storage device. It is made of plastic coated with m...

What is Computer

Topic: What is Computer Definition of Computer Computer is an electronic machine that takes data and instructions, processes data according to the given instructions, produces results and stores them for later use. What is a computer - Define computer - Computer Definition A computer is an electronic machine that can: Accept input, Process input, Produce output: Accept input. Note that, Input could be entered by a human through a keyboard, or received over a network, or provided automatically by sensors attached to the computer. Execute a set of instructions to process the input data. Produce output. Output could be data displayed to a human in the form of soft copy output or hard copy output, but it could also be anything that effects the world outside the computer such as electrical signals that control how a device operates. Today, computers are being used in every field of life. It can be used for different tasks. It is used for data processi...

Explain Different Types Of Output Devices

Output devices Out put devices are used to display results of processing to the user. They perform the following functions: Receive results from memory Convert data into human readable form Display results to the user Examples include: Monitor, printer, plotter, speaker, and multimedia projector. Different Types of Output Devices 1. Monitor LCD Monitor CTR Monitor Monitor is the most commonly used output device used to display results of processing. It has a TV like shape. Pictures on monitor are formed with picture elements called PIXEL. Monitors may be Monochrome that will display results in Black & White. Color Monitors are also available. They display results in multi colors. Monitor produces soft copy output. 2. Printers Printers are used to produce hard copy out put. They print processing results on paper. Printers are divided into two main categories: · ...

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