Search Engine
Internet search engine (called search engine) is a program or website, which aims to help Internet users find information on the network.
The term 'Search Engine' we use to:
web sites, searching - that is, retrieving the implementation of the software that operates with an open web interface for Internet users
software for indexing and retrieval of information in networks: the Internet, an intranet.
In general search engine software to automatically collect the information about text documents and files stored on the network (the area designated for search engines to index).
Software is a collection of search engines, modules, each of whom has a separate task. The set includes such items as:
Crawler, Spider, Bot - modules receiving documents from the web
Indexer, assessment and evaluation programme
Searcher - retrieving the search interface / subsystem respond to queries / analyzer queries + module presentation of results
And come to this:
Programs conversion of documents
Programs archiving repository [Google uses archvie manager Z]
Programs analysis techniques prohibited [spam]
Administrative modules