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Period: to
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Whois
Is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an internet resource, such as a domain name, an IP address block, or an autonomous system -
Archie
First widely used search engine that searched content files, mostly FTP files. Archie was the first tool on the web used for searching ocntents. -
Gopher protocol
Gopher protocol is a TCP/IP application layer protocol designed for distributing, searching, and retrieving documents over the Internet. -
World Wide Web Wanderer
The Wanderer was a Perl based web crawler that was first deployed to measure the size of teh web worldwide. -
JumpStation
The first WWW search engine that behaved, and appeared to the user the way current web search engins do. -
Yahoo!
The site was a directory of other websites, organized in a hierarchy, as opposed to a searchable index of pages.