Trapping Topic-Based Information - Information Trapping: Real-Time Research on the Web - page 117

Figure 7.7 a9 offers the ability to search a huge number of resources.
You can get a giant overview of these extra searchable resources—over 450
of them—at opensearch.a9.com/searches.jsp.
here are so many resources here that there's another search engine avail-
able just to ind them. If you're a registered user of A9, you can add these
resources to A9 as extra columns on your search. If you're not an A9 user,
you can add these sources to your search temporarily. It's easy to get over-
whelmed here. On the other hand, it's a simple way to dip your toe in the
wealth of available specialty search engines.
Gigablast
Gigablast (gigablast.com) is a small company compared to Yahoo or Google,
and contains a Web index that is a bit smaller as well. I'm including it here
because there's constant work going on to update it and add more features.