World Wide Web
The World Wide Web, also known as the WWW and the Web, is an information space where documents and other web resources are identified by Uniform Resource Locators (URLs), interlinked by hypertext links, and accessible via the Internet. English scientist Tim Berners-Lee invented the World Wide Web in 1989. He wrote the first web browser in 1990 while employed at CERN near Geneva, Switzerland. The browser was released outside CERN in 1991, first to other research institutions starting in January 1991 and to the general public on the Internet in August 1991.
World Wide Web Wanderer
The World Wide Web Wanderer, also referred to as just the Wanderer, was a Perl-based web crawler that was first deployed in June 1993 to measure the size of the World Wide Web. The Wanderer was developed at the Massachusetts Institute of Technology by Matthew Gray, who, as of 2017, has spent a decade as a software engineer at Google. The crawler was used to generate an index called the "Wandex" later in 1993. While the Wanderer was probably the first web robot, and, with its index, clearly had the potential to become a general-purpose WWW search engine, the author does not make this claim and elsewhere it is stated that this was not its purpose. The Wanderer charted the growth of the web until late 1995.