Classification of Computers

Computers are available in different shapes, sizes and weights, due to these different shapes and sizes they perform different sorts of jobs from one another.

They can also be classified in different ways. All the computers are designed by the qualified computer architectures that design these machines as their requirements.

A computer that is used in a home differs in size and shape from the computer being used in a hospital. Computers act as a server in large buildings, while the computer also differs in size and shape performing its job as a weather forecaster.

A student carrying a laptop with him to his college is different in shape and size from all the computers mentioned above.

Here we are going to introduce different classifications of computers one by one. We will discuss what are in classifications and what job they perform.

Super computer

The biggest in size, the most expensive in price than any other is classified and known as super computer. It can process trillions of instructions in seconds. This computer is not used as a PC in a home neither by a student in a college.

Governments specially use this type of computer for their different calculations and heavy jobs. Different industries also use this huge computer for designing their products. In most of the Hollywood's movies it is used for animation purposes. This kind of computer is also helpful for forecasting weather reports worldwide.

Mainframes

Another giant in computers after the super computer is Mainframe, which can also process millions of instruction per second and capable of accessing billions of data.

This computer is commonly used in big hospitals, air line reservations companies, and many other huge companies prefer mainframe because of its capability of retrieving data on a huge basis.

This is normally to expensive and out of reach from a salary-based person who wants a computer for his home.

This kind of computer can cost up to thousands of dollars.

Minicomputer

This computer is next in he line but less offers less than mainframe in work and performance. These are the computers, which are mostly preferred by the small type of business personals, colleges, etc.

Personal computers

Almost all the computer users are familiar with the personal computers. They normally know what the personal computer is and what are its functions.

This is the computer mostly preferred by the home users. These computers are lesser in cost than the computers given above and also, small in size; they are also called PCs in short for Personal computers.

This computer is small in size and you can easily arrange it to fit in your single bedroom with its all accommodation. Today this is thought to be the most popular computer in all.

Notebook computers

Having a small size and low weight the notebook is easy to carry to anywhere. A student can take it with him/her to his/her school in his/her bag with his/her book.

This is easy to carry around and preferred by students and business people to meet their assignments and other necessary tasks.

The approach of this computer is also the same as the Personal computer. It can store the same amount of data and having a memory of the same size as that of a personal computer. One can say that it is the replacement of personal desktop computer.

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Guide to Choosing a Computer System for Your Child

Before going further into choosing computers for children, I believe that you would like to know the answer to the following question:

Why do children need computers?

The easiest answer for this one is: "A child needs a computer so that he can play computer games". Everybody agrees. Nevertheless, let's not just limit on the short term use of the computer... Let's analyze a little the world we live in and see what can acomputer do for children.

Computers are starting to have more and more importance in our daily life. Almost everywhere you go, you find computers. At office or at home, a computer is almost indispensable.

Not knowing to use a computer, you find many difficulties. Moreover, things will not get easier in the future, because the world is getting more and more computerized. That is why your child should get accustomed and work with computers from an early age. If your child does this, it will be much easier for him to adapt to the ever-changing technology.

Educational products are nowadays released mostly on computer CD's.

More and more educational products for children are now released in the form of programs and electronic encyclopedias and can only be viewed with a computer, somehow forcing you to buy a computer for your child. Unlike the traditional learning methods, learning with a computer has the advantage of interactivity. Children love to learn with computers, because they can control the way they learn and what they learn.

Of course, a child will use a computer mainly to play computer games. At first, the computer will be for your child like a more expensive toy. The computer will be his favorite toy. Your child will play computer games the entire day. However, after a while, the child will settle down and start exploring the other sides of the computer.

At first, the only thing I was doing at my computer was playing. Then, as time passed, I started being interested in how computers work, the internet, 3D modeling and so on. Now I can say that I know a lot about computers.

The disadvantage of computers as toys is that it is a lot more expensive than other toys for children, but on the long term, the money you spend will come back multiplied many times in the form of knowledge for your child. That is why I do believe that a computer is a very good investment on the long run for you and your child.

Which computers for children to buy?

Since the main use of the computer for your child will be to play games, you should choose a fast system on which modern games will run smooth. Also, because modern computer games use lot's of space, a high capacity hard drive is recommended. The computer you choose for your child should be equipped with a DVD, because DVD's are starting to replace CD's as main data transport medium.

Now that you have chosen a computer system for your child, all you need is a monitor. You can choose from two types of computer monitors: CRT and LCD. LCD monitors are the ones you usually find in a office. They are flat and do not produce radiations. However, they are not recommended for the purpose your child will use it, because of the slow reaction time. CRT computer monitors are bigger and cheaper. They are more indicated for children who like to play computer games a lot.

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study recognized that factors such as depression

An underappreciated but scientifically substantiated fact is that getting a good education, challenging your mind, maintaining friendships and staying socially active can also help reduce the risk of developing Alzheimer's Dementia in later life. A new report in the American Medical Association journal, Archives of General Psychiatry, now compliments those findings in showing that simply having a sense of purpose in life can help to reduce this risk.

This new study was performed by Patricia Boyle, Ph.D and her group at Rush University Medical Center in Chicago. The participants in the study were 951 men and women with an average age of 80.4 years, who had normal cognitive function at the start of the study. That is, none had yet shown signs of developing Alzheimer's Dementia. In the study they defined purpose in life as, "The psychological tendency to derive meaning from life's experiences and to possess a sense of intentionality and goal directedness that guides behavior." In other words, that your life means something and that you have a sense of control of it. They measured the sense of purpose in life by tallying up scores from a 10 item questionnaire that was given to the subjects in the test.

The questionnaire included questions such as: "I have a sense of direction and purpose in life", and " I sometimes feel as if I have done all there is to do in life." Participants answered questions on a scale of one to five, and agreement with optimistic, positive questions such as the first, added points while disagreement with the more pessimistic questions, such as the second one, also added points. They found that individuals with a sense of purpose at the start of the study were less likely to develop Alzheimer's Dementia over the following seven years. In fact, it was shown that people with the lowest sense of purpose in life were more than twice as likely to develop Alzheimer's Dementia than those with the highest sense of purpose. The authors of the study recognized that factors such as depression, education, number of friends and family, gender, and race can and do affect ones risk for developing Alzheimer's Dementia. These factors were measured and analyzed in the study. They determined that even when all of these other important social and psychological factors were considered, a simple sense of purpose in life made its own unique, and statistically significant contribution to reducing the risk of Alzheimer's Dementia.

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Relaxing elements such as aromatherapy and music

With its focus on full, cleansing breaths, deep breathing is a simple, yet powerful, relaxation technique. It’s easy to learn, can be practiced almost anywhere, and provides a quick way to get your stress levels in check. Deep breathing is the cornerstone of many other relaxation practices, too, and can be combined with other relaxing elements such as aromatherapy and music. All you really need is a few minutes and a place to stretch out.

How to practice deep breathing
The key to deep breathing is to breathe deeply from the abdomen, getting as much fresh air as possible in your lungs. When you take deep breaths from the abdomen, rather than shallow breaths from your upper chest, you inhale more oxygen. The more oxygen you get, the less tense, short of breath, and anxious you feel. So the next time you feel stressed, take a minute to slow down and breathe deeply:

• Sit comfortably with your back straight. Put one hand on your chest and the other on your stomach.
• Breathe in through your nose. The hand on your stomach should rise. The hand on your chest should move very little.
• Exhale through your mouth, pushing out as much air as you can while contracting your abdominal muscles. The hand on your stomach should move in as you exhale, but your other hand should move very little.
• Continue to breathe in through your nose and out through your mouth. Try to inhale enough so that your lower abdomen rises and falls. Count slowly as you exhale.
• If you have a hard time breathing from your abdomen while sitting up, try lying on the floor. Put a small book on your stomach, and try to breathe so that the book rises as you inhale and falls as you exhale.

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