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| 1993 || June || First [[wikipedia:web robot|web robot]] || [[wikipedia:Matthew K. Gray|Matthew Gray]] produces the first known [[wikipedia:web robot|web robot]], the [[wikipedia:Perl|Perl]]-based [[wikipedia:World Wide Web Wanderer|World Wide Web Wanderer]], and uses it to generate an index of the web called the Wandex.<ref name=seh/><ref name=internetseh/><ref>{{cite web|url=http://www.mit.edu/~mkgray/net/background.html|title = Internet Growth and Statistics: Credit and Background|last = Gray|first = Matthew|accessdate = February 3, 2014}}</ref> However, the World Wide Web Wanderer is intended only to measure the size of the web rather than to facilitate search.
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| 1993 || September 2 || First web search engine || [[wikipedia:W3Catalog|W3Catalog]], written by [[wikipedia:Oscar Nierstrasz|Oscar Nierstrasz]] at the [[wikipedia:University of Geneva|University of Geneva]], is released to the world. It is the world's first web search engine. It does not rely on a crawler and indexer but rather on already existing high-quality lists of websites. One of its main drawbacks is that the bot accesses each page hundreds of times each day, causing performance degradation.<ref name=seh/><ref name=internetseh/><ref name="history">{{cite web |url=http://scg.unibe.ch/archive/software/w3catalog/|title=W3 Catalog History}}</ref><ref name="virtual">{{cite web|url=http://www-ksl.stanford.edu/people/gruber/virtual-documents-htw/|title=Virtual documents that explain How Things Work: Dynamically generated question-answering documents|author=Thomas R. Gruber, Sunil Vemuri and James Rice|date=December 1995|publisher=Knowledge Systems Laboratory, Stanford University}}</ref><ref>{{cite web |title=First Search Engine |url=https://thisdayintechhistory.com/09/02/first-search-engine/|website=thisdayintechhistory.com |accessdate=10 April 2020}}</ref>
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| 1993 || October/November || Second web search engine || [[wikipedia:Aliweb|Aliweb]], a web search engine created by [[wikipedia:Martijn Koster|Martijn Koster]], is announced. It does not use a web robot, but instead depends on being notified by website administrators of the existence at each site of an index file in a particular format. The absence of a bot means that less bandwidth is used; however, most website administrators are not aware of the need to submit their data.<ref name=seh/><ref name=internetseh/>
