There mainly four search engines Goolgle, Yahoo, MSN(Bing), and ASK other follow the pattern of these fours.
http://www.searchenginecolossus.com/
There are many types of search engines like Google, Yahoo, Bing, Alta vista etc.
There are two types of search engines 1. Hybrid search engines 2. Meta search engines
Identify 5 types of search engines and explain the difference between
Spider-Based Search Engines. Directory-Based Search Engines. Link-Based Search Engines.
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
Crawler based search engines such as google .com HUman powered directories and Hybrid search engines
search engines and directories
Spider-Based Search Engines.Directory-Based Search Engines.Link-Based Search Engines.Hybrid Search Engines.Meta Search Engines
GoogleBingAsk Jeeves
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.
I can think of 5 types of search engines actuallyCrawler-based search enginesHuman-powered directoriesHybrid search enginesSpecialty search enginesMeta search enginesThe first (crawler-based) being most common - like Google, Bing, and Yahoo.
Yes there is search engines for assets. Just google it on google and you can find some many search engines for assets.