It has been pointed out that another benefit of this search is that there are no minimum number of characters required. So searches such as "S2", "ir" and "LED" work quite well. You can use even a single character such as "C" and it has meaningful results.
Comments
What does it do, exactly?
-Phil
I stumbled upon it from some other website where there was a link to create your own custom search, so I did, and there it is.
Google "custom google search" and I think you will find it.