There mainly four search engines Goolgle, Yahoo, MSN(Bing), and ASK other follow the pattern of these fours.
The four main search engines used would be Internet Explorer, Google Chrome, Safari, and Mozilla Firefox.
The 4 most popular search engines in the are: Google Bing Yahoo DuckDuckGo
Straight/Inline engines, V type engines, Rotary engines and diesel engines
GoogleBingYahooAsk.com
Google, Yahoo, Ask.com, AskJeeves.com
Search engines themselves are of many types, but usually the general term refers to an internet search engineGoogleYahooBingAskYoutube: Video Search Engine
Your question lacks specificity. Place your question into context. There are more than four types of searches.
Search engines are necessary for locating, sorting, storing and ranking the value of that information on the web. Popular search engines like Google, Yahoo and Bing find relevant information and present it to users. In order to efficiently find a specific bit of data, it's important for you to know the four main functions of the search engines.
name four different types of olives?
coalbunker fuel oildiesel oilgasolinecompressed natural gaskerosene (jet engine grade)kerosene (rocket engine grade)
There are only four real search engines. GOOGLE.COM, Bing.com, Ask.com, and then Yahoo.com. Altavista.com, Avasearch.com , Aol.com , Clasearch.com , Dogpile.com .....- all of them feed out of the 4 big ones.