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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...

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: · ...

What are Different Types of Input Devices With Examples

Topic: Different types of input devices of a computer system with examples, pictures and explanation: Topics Covered are: Definition of Input Devices Functions of Input Devices ( How input devices work? ) Examples of Input Devices Pictures / Images of different input devices Different Examples of Input Devices With Description Keybboard Mouse Trach Ball Trackpad Joy Stick Light Pen Microphone Scanner Graphic Tablet ( Digitizer ) Digital Camera Touch Screen ( I/O Device / Dual Device - Perform Both Functions input + Output ) INPUT DEVICES ( Definition ) Input devices are used to enter data and instructions into computer memory from external world. Input Device is a hardware part of the computer that is used to enter data and instructions into computer memory. The examples of input devices include: Keyboard, Mouse , Track ball, Track Pad, Joy stick, Touch Screen, Light pen, Scanner , Digital Camera, Microphone, Graphics tablet e...

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