Memory

Memory is like an  electronic scratch  pad inside the computer. When you launch a program , it is loaded into run from memory, Data used by the program is also loaded into memory for fast access.  As you enter new data into computer, it is also stored in memory - but only temporarily. the most common type of memory is called random access memory, or RAM. As a result , the term memory is commonly used to mean RAM. It is also sometimes called read/write memory. Data is both written to and read from this memory. Perhaps the most important thing to remember about RAM is that it is volatile, so it needs a constant supply of power. when you turn off a computer , everything in RAM disappears. as you will soon learn this why you frequently have to save your data files to a storage device.

One of the most important factors affecting the speed and power of a computer is the amount of  RAM  it has . Generally , the more RAM a computer has, the more it can do and the faster it can perform certain tasks. The most common measurement unit for describing a computer's memory is the alphabet or a numeral. when people talk about memory, the numbers are often so large that it is useful to use terms such as kilobyte, megabyte, gigabyte and terabyte to describe the value.

Todays personal computers commonly have from 64 to 128 million bytes of memory. Newer system seldom have less than 64MB. Newer generations of PC's feature more RAM than previous generations did because newer versions of operationg systems and application software require ever increasing amounts of RAM to operate efficiently. Adding RAM is a relatively inexpensive way to boost a system's overall  performance. As a rule of thumb, the more RAM a computer has, the better. Note, too , that it is usually possible to add more RAM to a standard computer; some newer systems can be upgraded to nearly 1 GB of RAM. .

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