Computers
Computers apart from a physical entity have also been synchronized into the daily lives of people in several forms. Categorically a computer system can be divided into 3 main forms that are being used widely. They are the desktop, laptop and palmtop. However, part from these three categories of computer system, it has also been divide into different types depending on their use and are hence are divided basically in an uncategorized way. There has been automation in almost every sphere of human life where these uncategorized computers play a very important role. The un-categorized computers are:-
Personal Computers – Also widely known as PC these are the computers that are basically for the household and are mostly used by the people who like to work from home or is the type of computer that is completely used from the home. The configuration of a personal computer basically depends on the requirement of the user and the type of work they need to extract from the computer system.
Workstation Computers – these types of computer systems are widely used by the engineers and several technicians. The main difference between the PC and the workstation computers are the computation speed of the CPU which is enhanced by much advanced configuration as compared to the PC. The processors of these computers are designed to meet the graphics demand and designing purpose as desired by the user. These computers can handle voluminous data efficiently that is required as per the requirement.
Supercomputers – These computers are mainly used for computational purposes and are quite advanced in use as well as in the configuration as compared to the personal computers and the workstation computers. The configuration is mainly advanced in terms of its RAM and memory storage as well as the frequency of operation and the use is for tedious mathematical calculations etc.
Mainframe Computers – this category of computers is of standard configuration but is used on much wider scale by educational institutions and such large domains for as a server computer that serves the requests to around 500-600 computers.
Apart from these categories of computers based on the use, computer systems are also divided on the basis of their electronic nature. They are:-
Analog Computers – As quite obvious from the name, these computers are based on analog techniques and uses analog signals. They proceed after measuring the changes that are physical in nature such as pressure; temperature etc. and accordingly the pre decided arithmetic and logical operations are performed.
Digital Computers – They are the computers that have very high programming speed. This is because they operate on two digital states i.e. high and low which gives them an edge as compared to the analog computers.
Hybrid Computers – A mixture of both analog and digital computers yields the hybrid computers. They have operations of which some resemble to the operations of digital computer techniques and some of the analog computer techniques. In short, it is a combination of the main points of the analog and digital computers.
Tags: different computers, personal computers
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Saturday, April 17th, 2010
Select hundred people randomly and ask each one of them what the biggest invention of the century is and quite surely, more than ninety percent of them will say that it is the invention of computer. Just think how significantly computers have contributed to the rapid development in global technology. Computers have benefited us in all possible spheres of life. From mere clerical jobs to the making of million dollar movies, computers are bound to be used in each and every activity that takes place in today’s world. The first personal computer was invented in 1970 and since then, there have been constant developments in the field of computers and now, almost all homes in the urban world have a PC to flaunt.
The factors which have made computers a success are definitely speed, accuracy, data storage and multi tasking. How much time does it take for you to communicate with someone sitting in a different continent of the world using a computer? The answer will be not more than 5 seconds. You can say that it is possible more because of the internet but computer and internet is largely interdependent on each other. Even for performing complex calculations, computer hardly takes a noticeable amount of time. Computer has also enabled storing large quantity of data in a digital format to make things more convenient for us. Not a single big organization in the world can now think of operating without using computers. The progress that has taken place in businesses and economies worldwide in recent years wouldn’t have been possible without computers.
There isn’t a single machine invented till date having so many multiple uses. Be it education, entertainment, business or communication, for whatever purpose you want to use a computer, it will successfully satisfy you. The advent of portable computers has made things better for us. Nowadays, there are various types of computers which we may choose from according to our needs and requirements.
Desktop models are the most commonly used computers worldwide. A desktop model computer normally comprises of a CPU, monitor, USP, mouse and keyboard. It is called desktop because it can be fitted on the top of a desk easily. The main disadvantage of a desktop computer is the lack of mobility. To solve this problem, IBM came up with the first ever Laptop in 1986. Laptops are compact computers weighing extremely light and small in size which can be taken places. Laptop computers are nowadays referred to as Notebooks and they are constantly becoming popular worldwide. One can do the same work in a notebook which he/she does in a desktop computer but at the same time it is possible to carry a notebook to any place as it hardly weighs more than 6 pounds.
Other specialized laptops are also built nowadays which are meant for specific purposes. For example, laptops that are made only for the objective of internet browsing are called Netbooks. These are even lighter and smaller forms of computers. Many other innovations are also happening and you can also have devices like Palmtops or PDAs which are very much fall under different types of computers but their functions are limited to a certain extent.
Tags: Computers, importance of computers, personal computers
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Tuesday, March 16th, 2010
Today’s desktop computers are all about what goes inside of them. Each component of your desktop computers has a different function, and each one can be upgraded. One component of desktop computers that may be of particular interest to you is the computer video card.
What Do Computer Video Cards Do For Desktop Computers?
Your video card controls your computer graphics. Those of us who are old enough can remember back to the days where a computer screen had two colors and was simply lines, space and text. No pictures, no icons, forget about video games unless you enjoyed text-based adventures (basically a “Choose Your Own Adventure” book on a computer screen). That was before the modern video card. These handy pieces of equipment turned desktop computers into fully interactive experiences, allowing games, Power Point presentations, and even computer art.
Why You Need Computer Video Cards
You probably noticed that your computer provides all those wonderful pictures, animated avatars and so forth without you having to add anything. That’s because most desktop computers come with a video card built in. However, for the most advanced and realistic graphics, you may need to upgrade your video card. Then the question becomes, should you spring for the most expensive card, the cheapest, or something in between?
The Differences Between Cheaper and More Expensive Computer Video Cards
A lot of it, believe it or not, comes down to the type of monitor you’re using. If you’re working with a laptop, you probably don’t need the most expensive video card, because frankly, your monitor doesn’t have the resolution for it. Think of your eyes. You could have 20/20 vision, but if your binoculars are of low quality, you still won’t be able to see all that far.
On the other hand, if you’ve got an extremely large monitor, or a very high resolution monitor, or multiple monitors, or some combination of these, you might benefit from a more expensive video card. Even in this case, you need to consider what you’re using the video card for. If you’re mostly playing Flash games, or doing the occasional school project with accompanying graphs, your basic upgraded video card will probably do you very nicely. On the other hand, if you’re a video game purist, or are doing complex technical presentations, you may want to spring for the more expensive card.
Final Note on Computer Video Cards for Desktop Computers
One final word of caution. Like many things in the computer world, video cards tend to evolve very quickly. The card you shelled out big bucks for a month ago may be considered ancient history today. If you see a video card you like, you might want to wait a bit for the price to come down and/or for it to be available at a discount. If you must have state-of-the-art, do your research and make sure the new video card coming out tomorrow isn’t going to put the one you’re planning to buy today to shame.
Tags: Computers, video cards
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In this modern age of computer when almost every sector and every person depends on computers one cannot think of leading a life without this helpful device. Computers have evolved in our lives making it easier and faster. Computers can carry out many of our functions and are widely used by almost everyone in their daily life. But a slow computer can be a big trouble as it introduces an unwanted delay in the daily tasks of its user. So if you wish to keep the performance of your computer unhampered you should know how to deal with the problems that can slow down the pace of a computer.
How Can A Computer Become Slow?
There are many factors which can lead to the slowing down of the pace of a computer. Corrupt registry can greatly lead to the degraded performance of a computer. When a new application gets installed in the computer the window registry facility enables the operating system to know about the presence of the installed application thereby allocates necessary amount of memory for it. But when this application is deleted from the hard disk even the keys which were related to it gets deleted from the registry. This can greatly hamper the speed of the computer.
More Reasons For Slow Computer
Often the keys get corrupt and do not get deleted. As a result of this the operating unaware of the absence of the application keeps on sharing the part of the memory assigned for the application. For this reason the other applications cannot utilize the amount of memory that is free which in turn makes the computer slow. What you need to do is to take the aid of a registry cleaning tool which cleanses corrupt and unwanted keys from the window registry thus boosting up the speed of the computer.
Tags: slow computer
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Wednesday, March 3rd, 2010
Due to the rapid and ever growing development of digital technologies, the calibration of monitors is no longer the exclusive concern of professional editors and photographers. Nowadays, virtually everyone who owns a digital still or video camera has a vested interest in making sure his/her monitor is correctly calibrated. Many people do not realize that the color, shade, and hue of a digital image (moving or otherwise) can look completely different on a computer monitor than it does in a camera, or on a printed page.
How many times have you printed out an image only to find that it bears little resemblance to the photograph you took? Or perhaps a certain section of a photo, the portion you altered in Photoshop, has a different look than what you previously saw on the screen? These are very common, but no less annoying, problems for those who use their computers creatively—people for whom the correct shade, hue, and color of an image are all-important.
Apple offers a very easy approach to monitor calibration. To check it out, go to System Preferences>Display. From here you can adjust the brightness of the monitor to meet your needs. For those who are working with detailed images a bright screen may contribute to clearer viewing of the subject matter. For those who may be staring at the screen for long stretches a dimmer monitor might help to ease the strain on the eyes.
Both Apple and PC “System Preferences” allow computer users to change the resolution of their respective displays. Generally, for detailed and precision work, a higher resolution is recommended—the image being far clearer at a setting of, say, 1440 x 900, than it will be at, 640 x 480.
On Macs, color calibration can also be modified through Systems Preferences. After setting up your resolution click, “Color,” and select one of many options. Selecting a “Target Gamma,” will allow you to set the contrast levels for your monitor. Choose “1.8 Gamma” for a traditional monitor setting, or “2.2 Television Gamma” if you are planning to work with images for television.
Selecting a “Target White Point” will allow you to adjust the tint of the display. Here you have the option to go with a yellow, bluish or natural noonday base white for your monitor. There are other more advanced settings, which are commonly used for computer owners with higher grade, professional needs.
If you are like most people, you probably spend a good portion of your life sitting in front of a computer monitor. Don’t you owe it to yourself to make sure, what you’re looking at for all those hours is as perfect as it can possibly be?
Tags: calibration, Computers, monitors
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