A microcomputer can be defined as a small sized, inexpensive, and limited capability computer. It has the same architectural block structure that is present in a computer. Present-day microcomputers are having smaller sizes. Nowadays, they are of the size of a notebook. But in coming days also their sizes will get more reduced as well. Due to their lower costs, individuals can possess them as their personal computers. Because of mass production they are becoming still cheaper. Initially in the earlier days they were not very much powerful. Their internal operations and instructions were very much limited and restricted. But ... Read More

CPU and the main memory are having speed faster compared to the electromechanical input or output devices like printers, mouse etc. In such a case it is essential that the data lines of the computer should not kept engaged for a long time during communication with input/output (I/O) devices. Otherwise as an effect, the overall speed of the computer system comes down drastically. So I/O devices are connected to a computer through I/O ports.For example, to get a document printed by the printer, phase wise printer will get required information from the CPU to carry out the printing process. After ... Read More

Whenever a program executes inside a computer then at first the program has to be loaded on to the computer’s primary memory. And also when a does not execute then also the program must remain loaded in computers secondary memory. This memory unit works as an extra block. In a program in memory, the entire set of performed operations is written using the keyboard as a sequence of instructions. This collection of instruction is called a program. Also, the data on which the program is to operate is entered with the help of the keyboard and can be stored in memory. ... Read More

Output devices are used for displaying or recording the results computed by the computer. Most common output devices are the CRT display,  printer, and plotter.Following are some of the important output devices used in a computer.MonitorsGraphics PlotterPrinterMonitorsMonitors, commonly called a Visual Display Unit (VDU), are the main output device of a computer. It forms images from tiny dots, called pixels that are arranged in a rectangular form. The sharpness of the image depends upon the number of pixels.There are two kinds of viewing screen used for monitors.Cathode-Ray Tube (CRT)Flat-Panel DisplayCathode-Ray Tube (CRT) MonitorThe CRT display is made up of small picture elements ... Read More

The input devices are used for supplying program and data to the memory. In other words, the computer system reads the program and the data from the input devices. Most common input devices are the keyboard and mouse.Following are some of the important input devices which are used in a computer −KeyboardMouseJoy StickLight penTrack BallScannerGraphic TabletMicrophoneMagnetic Ink Card Reader(MICR)Optical Character Reader(OCR)Bar Code ReaderOptical Mark Reader(OMR)KeyboardThe keyboard is the most common and very popular input device which helps to input data to the computer. The layout of the keyboard is like that of the traditional typewriter, although there are some additional ... Read More

There are different points of view offered by different folks about the origin of the idea of having mirrors inside elevators but on one thing they all have the same view - psychological and ergonomic factors rather than technological factors brought mirrors into elevators. One line of opinion says this business of mirrors in elevators first began in Japan where it helped to resolve an ergonomic problem for people in wheelchairs. As the elevators in those pre-World War II days were really small, it was pointed out that mirrors in these elevators helped the folks in wheelchairs to clearly see ... Read More

Do you feel agitated if only one earphone is working and the second one has become mute? We cannot throw them out or use them half-heartedly.Most of the times, the reason will be the damage at the joint where cable and jack are attached. This may be because you put the mobile in jean's pocket and that causes friction between the jack and cable due to the twist, eventually, causing lose contacts.Most of the earphones can be fixed. The trick is to cut the cable and solder them both again. But the branded earphones which have the fiber cables cannot ... Read More

Mobiles have become a prerequisite in our day-to-day lives. They have helped in creating a global village in a true spirit. Technology has truly enhanced our standard of living. Living without our mobiles is not possible in any ways today considering their contribution to our lives. This can be understood in the following points -Staying Connected with the PeopleOne of the biggest support that is provided by mobiles is betterment and advancement in communication and networking with the people. It has helped reduce physical distance with the video calling facility. People today can get in touch with people within seconds ... Read More

LEDs (Light emitting diodes) are very widely used in today's electronics equipment and they are ruling the world's display technologies today. LED's are used for much electronic equipment. Mostly they are used as panel indicators on televisions, radios and other domestic electronic and industrial equipment. There are different types of LEDs.Traditional inorganic LEDs − These are used for small LED lamps, panel indicators etc.,High brightness LEDs − These are used for domestic lighting.Organic LEDs − Organic LEDs uses organic materials and are replacing the traditional types of LEDs with increased efficiency.

You have an assignment due and just sat down to finish it off quickly, but your slow laptop or PC is creating a trouble for you and the worst part is, you have no clue how to deal with this sluggish piece. No big deal if many users go the verge of even replacing their laptop and PC. Hey, wait! You simply don’t have to. You can give your device a speedy boost easily by making some tweaks here and there, know how?Go to Control PanelSimply open the control panel and remove all the old software, programs, heavy games and ... Read More