The size of the computer's hard drive. Memory Memory is the resource that a computer uses to perform its functions. Aside from the actual guts of the computer, memory is probably the most important variable in determining what a computer can do and how fast it can do it. In a sense, the amount of memory a computer has to use is the amount of brain capacity it has. Therefore, an increase in memory normally relates to an increase in the computer's ability to perform tasks.
Memory is referred to in different ways.
In this case the 32MB of RAM is the size of a memory chip placed in the computer. This kind of RAM is upgradable, meaning more RAM chips can be added to increase the computer's RAM memory. Everything a computer does takes away from the amount of available RAM memory. 25MB of RAM are being used. Now, only 7MB available to do anything else.