Someone already asked this question before.
You can take a look at their post, and my answer, over <A HREF="http://forumz.tomshardware.com/modules.php?name=Forums&file=faq¬found=1&code=1" target="_new">here.</A>
You will also find some links to a website that discusses this topic.
<font color=blue>"640 Kilobytes of computer memory ought to be enough for anybody." - Bill Gates, 1981</font color=blue>