External Storage
on Nov 14, 2009 in computer-systems System_Unit_and_Its_Components Computer-Concepts Since the internal storage capacity of PCs is limited, it places a restriction on how much data can be stored at a time for processing. However, this is not the only drawback. Once the PC is switched off, or in case of a power failure, all the data s...

Internal Storage
on Nov 14, 2009 in computer-systems System_Unit_and_Its_Components Computer-Concepts Besides the microprocessor, the system unit also contains a storage area where the data is stored before being actually processed. This storage area is called the internal storage. It is also referred to as primary storage, main memory ox Random Acce...

Comparison Between Printers
on Nov 11, 2009 in Printer computer-systems Computer-Concepts The output on the VDU cannot be stored for later reference. For a permanent output, you would require a printer that is also a common output device. Using the printer, you can obtain output on paper. Printers are capable of printing at very high spee...

Visual Display Unit (VDU)
on Nov 11, 2009 in computer-systems VDU Computer-Concepts Now that you are familiar with some input devices of the computer, let us take a closer look at an output device. Data that has been processed needs to be displayed to the user. This is done using the monitor or the VDU. The VDU is similar to a TV sc...

Keyboard
on Nov 10, 2009 in keyboard-keys-and-their-functions computer-systems Computer-Concepts The keyboard has already been identified as an input device. This is a component that closely resembles a typewriter console.While working on the PC using a keyboard, you will notice a flashing point on the VDU. This is the cursor. When you press a k...

Benefits and Limitations of Computers
on Nov 7, 2009 in computer-systems Benefits-of-Computers Computer-Concepts The fact that computers have made their impact on almost all aspects of life in today's world can hardly be questioned. The question that you may ask here is how do you benefit from using a computer.A computer provides three basic benefits:SpeedA...

Other Computer Systems
on Nov 6, 2009 in computer-systems Computer-Concepts The PC is although the most popular computer system, there are other computer systems too, which are categorized on the basis of size, cost and performance.Before we describe some of these computer systems, it is essential to understand the term syst...

How Does a Computer Work?
on Oct 31, 2009 in Input-Process-Output I-P-O Computer-Concepts Most activities follow the basic principle of Input-Process-Output. Consider an automobile assembly line. The raw materials required by an automobile assembling unit would include body, engine parts, tires, and so on.These materials are forwarded to...

Managing Data and Software
on Oct 8, 2009 in Managing_Data_and_Software Computer-Concepts IntroductionBefore looking into data and software management, let us find out what is disturbing Mr. Croft of Croft Constructions. He and his employees seem to be having problems using computers in their office. The problems are related to managing d...

Master and Working Copies of Data and Software
on Oct 3, 2009 in Managing_Data_and_Software Computer-Concepts Smallville High School had a file containing the names and marks of its students. While working with the diskette, the Principal accidentally deleted all the files. The results of the students could not be given on time.The above mentioned problem wo...