There are two types of search engines
1. Hybrid search engines
2. Meta search engines
Google & Yahoo are two main search engines.
Google, Yahoo, Bing are biggest search engines. There are some more search engines like Astalavista, Lycos, Ask, etc.
search engines and directories
Comedies, Tragedies and Histories
The electrical equipment market for internal combustion engines is divided into two categories: original equipment manufacturers (OEMs) and aftermarket.
Drugs and illegal drugsfast and slow
Meta engines search for information on different search pages at the same time. If someone typed in "hummingbirds" they would search on two or three search pages at once.
search engines
Human powered directories are special types of search engines, organized into subject categories. The directories are smaller than most search engines and do not contain full text of the webpage they link to. Such directories are good when a user is interested in a general topic of search.
Spider-Based Search Engines. Directory-Based Search Engines. Link-Based Search Engines.
Horizontal search engines are general-purpose search engines such as Google and Yahoo. Vertical search engines, meanwhile, are specialized by content such as Trulia, Mocavo and Yelp.
Bing (www.bing.com) Google (www.google.com)