olemus
WWW osa, mis on indekseeritav tavaliste otsimootoritega,
ülejäänu on nähtamatu: süvaveeb ja pimeveeb

Wiktionary:
(computing, Internet) the portion of the World Wide Web that is indexed by conventional search engines

ülevaateid
https://en.wikipedia.org/wiki/Surface_web

https://www.spiceworks.com/it-security/security-general/articles/dark-web-vs-deep-web/

https://www.britannica.com/story/whats-the-difference-between-the-deep-web-and-the-dark-web

https://us.norton.com/blog/how-to/what-is-the-dark-web

https://cj.msu.edu/_assets/pdfs/cina/CINA-White_Papers-Holt_Open_Deep_Dark.PDF