search engine friendly url masking?

I hear that some search engines have problems with dynamic and long urls and also hear that url masking can over come this problem.

How can I create a search engine friendly url masking? I have seen some directories do something like this:
instead of

www.myDomain.com/index.php?name=computer&type=ibm

PHP:

they put:

www.myDomain.com/computer/ibm

PHP:

How do they do that?

 

Its fairly easy to do and uses mod rewrite. The Apache forum is where you should start.

 

Thanks for the tip. seems exactly what I need.

 

You put some code like this in a .htaccess file:

Options +FollowSymLinks
RewriteEngine on
RewriteRule (.*)-(.*)\.htm$ /index.php?name=$1&type=$2