1.7 Where can I search for it?
1.7.2. Meta-search engines
Meta-search engines and multi-search engines use search engines from several services to provide results for a search. As an advantage, they explore more resources than a single search engine does. As a disadvantage, they do not allow for either complex searches or the use of logical operators. Generally speaking, they are less developed than main search engines, which turns them into a not too promising alternative, particularly if we want to perform highly refined, specific searches. They are usually devoted to e-commerce, such as the popular website www.kayak.com, which searches for hotels, flights and rental car services in several search pages.