How to achieve different levels from 1 site - showing in serps

Hi , have been out of the loop for a while, this question will be already answered somewhere ( but can't find it) , here is an example of what I mean , with the search " digital point forum " the top listing (as it appears to me ) has several levels or tiers in the serp, ( such as google- adsense and so on ) how is this achieved in Google , or what factors are involved Thankyou

http://www.google.com.au/search?hl=en&q=digital+point+forum&btnG=Google+Search&meta=

 

The sub-links are called "site links" by Google and are determined by the Google algorithm.

 

Why does the search " anysis inc " ( a corporation ) give the multi sub-linked result ( below)? and other coporations don't ? Is there a thread on this somewhere ? Thanks

http://www.google.com/search?hl=en&rlz=1B2DVFC_enAU222AU223&q=ansys&btnG=Search

 

i think you mention site links . read http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=47334

 

Thanks trichnosis - has an air of mystery to it , wonder if submitting sitemap would help , says its automated - regardless this is a big plus if it comes up in a search ( for the site owner )

 

There is more on it here for anyone interested

http://googlewebmastercentral.blogspot.com/2007/10/webmasters-can-now-provide-feedback-on.html

 

I wrote an article on Site Links not too long ago. I looked at some of the things Site Linked domains had in common. The url is below if you want to read it.

Google Site Links