UNDERSTANDING COMPUTER SYSTEM

                         COMPUTER


 computer, device capable of performing a series of arithmetic or logical operations. A computer is distinguished from a calculating machine, such as an electronic calculator, by being able to store a computer program (so that it can repeat its operations and make logical decisions), by the number and complexity of the operations it can perform, and by its ability to process, store, and retrieve data without human intervention. Computers developed along two separate engineering paths, producing two distinct types of computer-analog and digital. An analog computer operates on continuously varying data; a digital computer performs operations on discrete data. 

Computers are categorized by both size and the number of people who can use them concurrently. supercomputers are sophisticated machines designed to perform complex calculations at maximum speed; they are used to model very large dynamic systems, such as weather patterns. Mainframes, the largest and most powerful general-purpose systems, are designed to meet the computing needs of a large organization by serving hundreds of computer terminals at the same time. Minicomputers, though somewhat smaller, also are multiuser computers, intended to meet the needs of a small company by serving up to a hundred terminals. Microcomputers, computers powered by a microprocesser, are subdivided into personal computer and workstations, the latter typically incorporating RISC. processor Although microcomputers were originally single-user computers, the distinction between them and minicomputers has blurred as microprocessors have become more powerful. Linking multiple microcomputers together through a local area network or by joining multiple microprocessors together in a parallel-processing system has enabled smaller systems to perform tasks once reserved for mainframes, and the techniques of gird computing have enabled computer                 utilize the unemployed processing power of connected computers.
 

              Buying Tips

Buying a Computer: Desktop vs. Laptop
Laptops are almost always sleeker in design than desktop computers. It is no small wonder why people are attracted to laptops. But watch your step. These small beauties have a catch. You could end up with a stylish and eye-catching laptop that cannot perform at par with your expectations. Here are some things that you may want to consider before deciding between a desktop and a laptop.
Getting a New Computer: Buy Complete System or Build Your Own Rig?
Building a computer from scratch used to be limited to PC enthusiasts and people with formal training. With plenty of help materials and tips on the Internet, building a computer is now possible for those with minimal or no training on PC assembly. Is it better to build your own computer instead of buying a complete set from the PC store?
Buying a Computer: How Many USB Ports Do You Need?
Most laptop computers only come with two USB ports. Desktops can have around 4 or 6. How many USB ports do you really need in your computer? The answer depends on the number of computer accessories, peripherals and devices that you use and which require a USB connection.
Where to get hold of computer components
The computer is known to be on of the most used inventions in man kind. From homes to offices, one will always find a computer as it has become an important part of every day life. We take a closer look at the computer components that make up a computer which allows us to use it the way we do.

Are you planning to buy computer components?
When deciding to go ahead with buying computer components, there are a few things that you have to keep in mind. All PC Computer Hardware are known to come in various versions, one better than the other.

Where to Buy Computer Components
In our highly advanced society today, technologies are modified, developed and improved at a very fast pace.  The rapid rate of technological advancement is plainly evident in the computing industry. Every year, large PC part manufacturers always release new, breakthrough computer hardware that are faster and more powerful than their predecessors.

Buying an Optical Drive: Four Tips to Help You Choose the Right Drive
New computers usually come with a built-in CD or DVD drive. In most cases, this optical drive is a combination of both a CD writer and a DVD-ROM that you can use to play CDs and DVDs. You will want to upgrade this optical drive if you want to write files to a DVD. At other times, a computer will not have a CD drive when you purchase it.

Buying a Dedicated Sound Card For Your PC: Three Things to Consider
Computers use a powerful component known as a sound card to process and play sounds and music files. Without a sound card in your computer, you will not be able to listen to mp3s and CDs, you will not be able to hear application tones and the playback of audio files, and you will have to make do with mute movies and videos.

Buying Computer Components: Three Things to Consider
Whether you are buying computer components to build a new computer or to upgrade your old PC, be smart about it. Do not get carried away by the latest technology or the highest-priced hardware. Computer technology is developing very rapidly. What may be new now will not be new months later. Consider what you need each PC component for and buy those that you will and can use.

Buying a Laptop Battery: Three Things to Consider
You can only truly appreciate the beauty and functionality of a laptop when you bring it with you outdoors and do your computing without plugs and power outlets. Many people buy a laptop for its portability alone and the ability to work on the go. Many laptops, however, ship with a standard battery that can only power a laptop for a few hours. Sometimes a few hours are not enough to finish your computing tasks.

Buying a Graphics Card: Integrated Vs. Dedicated
When purchasing a graphics card or video card, you have the option of choosing between two types: an integrated graphics card and a dedicated graphics card.