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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 Main Difference Between System Software and Application Software

Topic: Explain Main Difference Between System Software and Application Software Differentiate between system software and application software Before , explaining the main differences between application software and system software, let us know the definitions of Application software and System software with examples. What is System Software: System software is a set of programs to control all components of computer and to manage overall operations of computer system. Differences between System software and application software System software is used as a base to install and run all application software. Examples of system software include: Operating Systems, like Microsoft Windows, DOS, Unix and Linux Device Drivers like Device driver software of a Printer (found on CD normally provided with the printer) Utility Programs like AVAST anti virus, Disk Scanners and File Viewers etc. What is Applicat...

Electricity Bill Calculator Formulas in Excel

Today, we will discuss How to create an Electricity Bill Calculator Worksheet by using Electricity Bill Calculator Formulas in Excel . The following formulas will be used in Electricity Bill Calculator Worksheet: Q: Prepare a worksheet according to the following instructions: Create a worksheet in MS Excel according to the requirements Enter sample data of Electricity units consumed by customers in a city Apply formula to calculate Units Consumed Apply formula to calculate Electricity Charges Apply formula to calculate Surcharge Apply formula to calculate Bill Payable Note: Every formula will start from = Units Consumed Formula=D5-C5 Electricity Charges Formula=IF(E5>200, E5*15,IF(E5>100, 1000+(E5-100)*12, E5*10)) SURCHARGE FORMULA = IF(F5>5000, F5*5%,IF(F5>1000, F5*3%, 0)) BILL PAYABLE FORMULA = SUM(F5:G5) Download Excel Electricity Bill Calculation Worksheet Free Image for Electricity Bill Calculator Formulas ...

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