Opera Mini is an app i have on my iPod that gets around the barracuda web filter. So i can use facebook and YouTube.
VPN service is also a good and reliable solution to bypass barracuda web filter. For example a service like vpn account ( http://vpn-account.com ) is easy and fast way to unblock restricted sites.
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.
Search engines are internet encyclopedias that allow us to find and filter out relevant information.There are many search engines available now a days like Google,Yahoo,MSN,Alexa,Bing,AltaVista,Ask,Gigablast,Wikipedia e.t.c
There are two types of search engines 1. Hybrid search engines 2. Meta search engines
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.
name five search engines
It is where you can search anything you wanted to. Yahoo ang Google are example of search engines.
you dont, thats why they are crawler search engines.
Discovery
Yes there is search engines for assets. Just google it on google and you can find some many search engines for assets.
Crawler based search engines such as google .com HUman powered directories and Hybrid search engines
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.