Major Search Engines

Yahoo! Search Marketing
Put your business in front of potential customers at the precise moment they're searching for what you sell.
LookSmart
LookSmart is primarily a human-compiled directory of web sites. It gathers its listings in two ways. Commercial sites pay to be listed in its commercial categories, making the service very much like an electronic "Yellow Pages." However, volunteer editors at the LookSmart-owned Zeal directory also catalog sites into non-commercial categories for free. Though Zeal is a separate web site, its listings are integrated into LookSmart's results.
AltaVista
AltaVista opened in December 1995 and for several years was the "Google" of its day, in terms of providing relevant results and having a loyal group of users that loved the service.
Teoma
Teoma is a crawler-based search engine owned by Ask Jeeves. It has a smaller index of the web than its rival crawler-competitors Google and Yahoo. Some people like its "Refine" feature, which offers suggested topics to explore after you do a search. The "Resources" section of results is also unique, pointing users to page that specifically serve as link resources about various topics.
Ask Jeeves
Ask Jeeves initially gained fame in 1998 and 1999 as being the "natural language" search engine that let you search by asking questions and responded with what seemed to be the right answer to everything.
Google Advanced Search
Google is the most powerful information resource humans have ever constructed. With over 8-billion references in its rapidly growing, organically generated index, Google sets the standards other search engines follow.