What is Memory?
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by Dinesh Thakur

In humans, the memory is mind warehouse , where are stored for a later use the various components experience. The memory of a computer somewhat similar but more limited at its possibilities.

For an individual, having little Memory can be a slight handicap, but memory is a vital component for a computer; without it, he could not how, since he uses to store programs that control.
In both cases, memory involves two interventions: storage and recall. It is obvious a memory is only useful if it is possible to recall the information that was there stored previously.
There is another common point between these two memories is using short and long term. For example, a man crossing Street remembers that he has to wait the passage the approaching car. But when it reached the other side of the road, he forgets that this vehicle. Here, the memory is not sought in the short term.
By extension, computers have them also a short and long term memory. the long-term memory or nonvolatile memory contains programs and data the user wants to keep; these are stored on tapes, floppy disks or on ROM cards.
The short-term memory or volatile memory, is located inside of the computer in the RAM chips and is used to store data only during his work. Soon as it is switched off voltage, even for a fraction of Second, the entire contents of the memory is lost instantly.
However, comparison with the memory human ends. To enable operation machine, programs and data must be transferred from the memory long-term to short-term memory. Moreover, how to store and recall data in a computer is completely different of the brain.
The functioning of human memory remains a mystery; the memory of an event particular does not seem to be saved in a precise location in the brain. It is not necessary to know the storage location of mind to remember. And, when we ended up using that memory, it is no need to put it in a place specific of our brain.

Organized Chaos

In a computer memory, the address of each item of information is very important. The computer must be able to find each byte information, it is part of a program or data of a program. For this, he must remember to where he position information.
Human memory is more like a packed box information, but not organized. The various parts of the information are apparently introduced randomly entangled in each other during that the accumulation of images and experiences continues. One way or another, the brain Successful exploitation of this data and extract what they need, when they need it.
The memory of a computer similar to a huge loft, where each nest is separated others. Here everything is designed very ordered; each pigeon nest number (address) and contains only one byte. The computer finds the data by searching the pigeon nest number, and not the contents of this nest.
When you turn on your computer voltage, generally appears to the screen to announce its operation. In most cases, it tells you Also you can start writing a program. This message and functions you used to write your program are stored in a part of the internal memory computer; they must be stored in the Long-term memory (usually in the read-only memory or ROM chip).
This part of the memory of the computer contains programs that read the characters typed at the keyboard, display characters the screen and take care of other operations internal management. It also contains a program that translates commands in BASIC binary language understood by the computer.
When turning on the PC, the prompt often announces the amount of available memory. The number given in the message indicates the number of nests of pigeons ยท are free. Each time you press a key, you send a byte in memory to store it. Press the "k" key, for example, places the letter "k" in a pigeon's nest in a binary form. But in what pigeon nest the letter "k" is it placed? It is directed at the first available memory location in the short term from the computer. Suppose our loft is empty: the "k" is placed in the nest of the upper left corner.
If you press another key, "e" for example, bits corresponding set is placed in the second empty nest, to the right of "k". If you type a third key, a "y" that "y" is placed in the third nest, immediately to the right of the "e". The word codes "key" appear in the top row of our loft.
The computer has an internal counter that lets him know how it happened nest; he knows where to start because the integrated program of internal management tells it where begins the free area of memory. Every time a letter is stored, the meter registers a unit to assign the next nest to the next letter typed.

Memory is the temporary storage space in little chips in your computer, as opposed to the permanent storage space on the hard disk. If you think of your hard disk as a filing cabinet where you permanently store everything you need, you can think of memory as your desk where you put things temporarily while you are working on them. When you're done working, you return those items on your desk (the items that were in memory) back to their filing cabinet (which is your hard disk).

Memory can be either volatile, like RAM (random access memory) which means anything stored in it will disappear when the power is turned off or the computer crashes. Or it can be non-volatile, like ROM (read-only memory), which means the information will not disappear when the power is turned off or the computer crashes. A computer needs both RAM and ROM to operate, and how fast the computer can get to the memory and use what's in it is a factor in the speed of your machine. If you're wondering about how much memory your computer has or how much you really need to get done what you do, you are most likely concerned with the RAM.



Dinesh Thakur is a Technology Columinist and founder of Computer Notes and Technology Motivation. Turn Mobile View Off