Search Engine	Simple Form	Search Logic				Fuzzy Logic	Term Weighting	Sorted Output	Ranked Output	Find Like
		Boolean	Proximity	Nesting	Truncation
AltaVista	X	X	X	X	X			X	X
Excite!	X	X	X	X		X	X	X	X	X
HotBot		X	X	X		X	X		X
Infoseek	X	X	X	X	X	X	X	X	X
Lycos	X				X				X
Open Text		X	X	X					X	(X)
WebCrawler	X	X	X	X		X	X	X	X
Yahoo!	X	X	X	X			X

Simple Form:   The interface is simple; that is, if it contains only a single entry box and no more than one or two simple blink lists or check boxes. Search Logic: Boolean - supports the use of standard Boolean operators. Proximity - supports the use of some form of word proximity searching, exclusive of the ability to search on phrases. Nesting - permits the use of nested logic in search queries. Truncation - allows search terms to be truncated or implicitly truncates entries. Fuzzy Logic:   Some sort of artificial intelligence is used to interpret the search query either to perform the search or to rank search output. Term Weighting:   The use of a prefix (+) to weight or (-) to exclude search terms is supported. Sorted Output:   Output is sorted by the search engine or can be sorted by the user. Ranked Output:   Output is ranked by relevance. Find Like:   The engine provides a quick link on every return to allow finding similar sites. The search engines are ranked by the number of features available in the figure below:

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