Overture, the new name for GoTo, became the leading pay-for-placement search engine.
The Teoma search engine, launched in April, was bought by Ask Jeeves in September.
The Wisenut search engine was launched.
Magellan ceased operation.
By the end of the year, Google had indexed over 3 billion Web documents (including a Usenet archive dating back to 1981).
Consolidation continued: LookSmart acquired Wisenut.
The Gigablast search engine was launched.
Consolidation heated up:
Yahoo acquired Inktomi and Overture, which had acquired AltaVista and AllTheWeb.
FindWhat acquired Espotting.
Google acquired Applied Semantics and Sprinks.
Google indexed over 3 billion Web documents and answered over 200 million searches daily.
Competition became more intense:
Yahoo! switched its search from Google to its own Inktomi and Overture services.
Searching on the public Web has no direct analog with searching libraries, which is both an advantage and a disadvantage. Library models provide a familiar and useful comparison for explaining the options and difficulties of categorizing Web resources.
First, locating an item by its URL has no direct equivalent in library models. The URL usually combines the name of a resource with its precise machine location. The URL approach assumes a unique resource at a unique location. Library models assume that documents exist in multiple