W3Catalog – Sep 2,1993:
The web’s first primitive search engine W3Catalog was released by Oscar Nierstrasz at the university of Geneva. Oscar wrote a series of Perl scripts that would periodically take the mirror images of the web pages and rewrite them into a standard format to form the basis for W3Catalog. This was the period that made statistics to come up with various SEO methodologies.

Google – Sep 4,1998:
Larry page and Sergey Brin founded Google when they were the students at Stanford University. On this day, Google was considered a first private held company that attracted more people towards search engines. Google plays a major role in developing and implementing the latest SEO technicalities.