Basic Computer Features 101

When buying a desktop computer is one of the first things to look at will be its use and individual budget. For example, a machine that will be primarily used for gaming should focus on lots of memory, a powerful processor, enhanced video and graphics, while a computer that will be used for Internet browsing and simple word processing will not need nearly as much frills. This computer-buying guide covers the basics to give you some idea of the important features to look at.

Basic Computer Features 101

Basic Computer Features 101

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Basic Computer Features 101

Basic Computer Features 101

CPU

CPU stands for central processing unit and is the brains of the computer. It is where most of the actual computing takes place and the quality of the processor will greatly determine the performance of the computer. The processorspeed is measured in GHz.

There are budget processors, mid grade and high-end processors. The high end ones maybe necessary for enhanced computer functions, such as gaming and entertainment, but overall the mid grade types are quite good and will deliver great performance for most any uses. Overall the two best brand names for processors are Intel and AMD.

RAM Memory

RAM memory is used to run programs on the computer and the more RAM you have, the better the performance and speed of computing and to avoid slow downs and crashes. Gaming and entertainment need a lot more RAM than regular computer tasks for which 1 GB is usually sufficient, but 2 GB is really great. At least 3 GB, is optimal for gaming and mediaexperiences.

Also, it is a good idea to check and make sure that there are open memory upgrade slots so you can always add more memory as it is fairly cheap and easy to install.

Hard Drives

Hard drives are significant for the speed capacity of computers. Overall, the larger the drive, the more storage space and the faster the computer. Optimal is 500 GB.

Optical Drives-CD/DVD/Blu-ray

Most computers these days come with DVD/CD burners, and even if they do not they are cheap and easy to install and come in internal and external versions. Blu-ray is the latest option for burning in high definition format.

External Ports and Connections

Ports are used to attachperipherals, such as printers, Internet, iPods and others. Most important will be to have at least 5 USB ports, one FireWire port as well as an Ethernet connection for Internet and networking. Overall, the more ports you have the more variety and options will be available to add ons.

Monitors

A good monitor is essential for a quality computer experience. The older CRT models have become largely obsolete with the introduction of the LCD screen monitors, however many people still use them and they can still be found at online shopping sites. LCD screen monitors have a superior display with a reduced size due to the flat panel and their lower power consumption over the CRT models.

Basic Computer Features 101

Different Types of Human Memory

The process whereby memories are forged into the mental system is a remarkable one that is often misunderstood. But by studying the nature of memory, we gain a higher insight in to the intricate workings of this most vital aspect of the human brain. Some compare the human memory to a tape recorder-yet it is not so simple. While memory can serve as a retainer for key data that we want to "re-play" over and over again, it is a more dynamic and complex mechanism. In addition to storing information, it also allows us to recall feelings, sensations, images, as well as carry out basic functions such as talking.

Different Types of Human Memory

Different Types of Human Memory

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Different Types of Human Memory

Different Types of Human Memory

Since human memory is such a complex system, it cannot be nailed down to an exact science. In fact, cognitive psychologists working in thefield of memory often have disagreements. What has been established is that there are three main types of human memory – sensory, short term and long term-plus a fourth related faculty called the working memory.

When we speak of "sensory memory", "we are referring to the few split seconds that follows the initial perception of an object. If you are able to briefly look at something and immediately memorize its details, then that is an instance of sensory memory. Usually, in these cases, when you are only able to see something for a few split seconds, you might feel like you saw a lot more than you are able to describe.

Some of the data that is perceived in a sensory memory will subsequently be transferred to a short term> memory. We call short term memory the ability to recall something from several seconds to a minute ago.

There is also a type of memory that is referred to as working memory. It can be viewed as a form of short term memory, in that it refers to the limited store that is needed in order for certain mental tasks to be performed. Whereas short term memory is rooted in duration, working memory is defined by purpose. Baddeley's Model of Working Memory defines three components to this type of memory -the verbal store, the Visual-spatial sketchpad, and the central executive, which determines control and rehearsal.

Finally, there is long term memory. Unlike short term and sensory memories, which disappear in abrief amount of time, long term refers to memories that can be stored for a period of up to several years. Psychologists disagree on how long term memory works. Some argue that a long term memory remains in the brain forever, but this is impossible to prove, as there has never been a human being who has lived forever!

While it was once thought that there was no real determining factor between what made in short term memory and a long term one, research has since established that the brain contains numerous systems of memory and that information is constantly being transferred among these various systems. Hence, the ongoing research in to the mysterious nature of how memory works.

Different Types of Human Memory

What Are the Main Components of a Computer System?

We all know that computers are complex devices, machines made out of an amalgam of electronic parts and components. But which computer components are essential for a computer to run? Modern PCs can still function fully without Bluetooth or a floppy disk drive. Here is a list of computer components that a computer system cannot do without.

What Are the Main Components of a Computer System?

What Are the Main Components of a Computer System?

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What Are the Main Components of a Computer System?

What Are the Main Components of a Computer System?

* Motherboard

The motherboard is a very basic unit in any computer system. This is the computer component to which all other internal computer components are attached. It links all the other main components of a computer system together. Consequently, motherboards are sometimes referred to as the "heart" of a computer system.

* CPU

The centralprocessing unit or CPU is the computer component responsible for running programs and applications on the computer. Without a CPU in your computer, you will not be able to do any tasks--you cannot boot to an operating system, you cannot play music, videos and games, and you cannot do any word processing. For a computer to function, it has to have a CPU.

* RAM

Random Access Memory or RAM is another vital computer component. It is the storage Media where a computer temporarily stores files and information that it can pull at random when running programs and applications. Together with the CPU, RAM determines the computer's speed. A computer with a large RAM and a mediocreCPU can actually run faster than a computer with a Powerful but low CPU RAM.

* HDD

As opposed to the RAM, the hard disk drive or HDD stores computer files and data long-term. Even without Power, the hard drive still retains the files stored inside it. The hard drive can store important system files like the operating system, program files and other data. It can also be used to store mp3s and videos. If the computer runs out of RAM, it will temporarily use the hard drive as virtual memory bank.

* Video Card

A video card allows a computer to display images on the computer monitor. It helps speed up the rendering of images onScreen and contributes to clearer and detaiLED pictures. PC gamers andMultimedia software users will find a high-end dedicated graphics card helpful in running graphics-intensive programs smoothly.

* PSU

The power Supply unit or PSU supplies all computer components with power. It converts the high voltages from an AC power outlet to lower voltages that are safe for internal computer components. Without a PSU, computer and its components will not be able to power up.

A computer can also benefit from an optical drive to read and play CDs and DVDs, a network card and router for connecting to the Internet, and peripheral devices such as Printers and scanners. The motherboard, CPU, RAM, HDD, video card and PSU are, however, the main components that make up a computer system.

What Are the Main Components of a Computer System?