RAM (Random Access Memory)

As you work on the computer, the programs used to run the computer and the information you enter is stored in a temporary area of the computer’s memory referred to as RAM or random access memory.

Ram is stored on electronic chips connected to the main board in the system unit (the motherboard) next to the CPU. The amount of RAM in a computer depends on the size and number of RAM chips the computer contains. As RAM increases, more information and programs can be used at one time.

RAM is measured in bytes; you can think of each byte as being equivalent to one character. RAM chips are measured in megabytes (meg means a million; abbreviated MB). Less-powerful computers come with 128 MB RAM; newer, more powerful computers come with 512MB, 1GB or more RAM. Many newer programs operate more efficiently with increasing amounts of RAM. Windows XP requires a minimum of 64 MB and computers with 128 MB or more of memory is preferred. Fortunately, it is easy to add additional memory to most personal computers.

The most important thing to remember about RAM is that it is volatile; that is, whatever is in RAM exists only while the computer is on. As soon as you turn off the computer or exit the program with which you are working, the information is lost. In addition, if the computer is accidentally shut off – such as with a power failure, lightening storm, or the plug coming out – everything is lost. There is, however, a way to save your program and information by storing it on disks.