There is no limit to. You can use as many of them that you want at one time. Each may give you different results. I wouldn't recommend doing more than three though.
A web metasearch is a search involving many search engines at once. example: http://www.tripleme.com
There are about 12 major search engines in general, but if you mean how many search engines that are around the globe, refer to the related links below.
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.
Yes there is search engines for assets. Just google it on google and you can find some many search engines for assets.
There are primarily three types of search engines: traditional search engines, vertical search engines, and meta-search engines. Traditional search engines like Google and Bing index the entire web and return results based on algorithms. Vertical search engines focus on specific niches or industries, such as medical or academic searches. Meta-search engines aggregate results from multiple search engines to provide a broader range of information.
Generally speaking, meta search engines perform searches using a conglomeration of other search engines. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously. Metasearch engines operate on the premise that the Web is too large for any one search engine to index it all and that more comprehensive search results can be obtained by combining the results from several search engines. This also may save the user from having to use multiple search engines separately.
Yes, you can search for flights from multiple airports at once using certain travel websites or search engines that offer this feature.
Search engines basically a program that receives your search request, compares it to the entries in the index, and returns results to you. There are many types of search engines defined in different groups according to their works. Here are the some examples of search engines :Google.comYahoo.combing.comaltavista.comAsk.com
There are many types of search engines like Google, Yahoo, Bing, Alta vista etc.
A meta-search engine is a search tool that sends user requests to several other search engines and/or databases and aggregates the results into a single list or displays them according to their source. Metasearch engines enable users to enter search criteria once and access several search engines simultaneously.
There are two types of search engines 1. Hybrid search engines 2. Meta search engines
It must me standle, which combines many search engines with different specific areas. you may try it standle.com