what is the first search engine?

Archie is a tool for indexing FTP archives, allowing people to find specific files. It is considered to be the first Internet search engine.
source
en.wikipedia.org/wiki/Archie_search_engine

I dont know exactly but Archie search engine i heard so.

It wasn't long ago when the first Search Engine, "Archie", was created. Archie was so exciting that soon many others like it began to sprout up (Veronica, Jughead, et al.). As Search began to develop into its own industry, new Search Engines started to incorporate many new technologies in order to keep up with the scale and growth of the World Wide Web. New Search Engines like Excite and Lycos (developed by Carnegie Mellon University, the alma mater of SEOENG'S President of Technology) brought new vector-based algorithms which greatly improved the quality of Search. One of those new Search Engines, Altavista, brought what was considered at the time to be almost unlimited bandwidth. Natural Language querying and many other advanced features added to the user experience.

As per my infor mation, W3Catalog, the web's first primitive search engine, released on September 2, 1993, but if you can know more, You can such information on net.