IT Services Circle
Jul 15, 2026 · Fundamentals
Why Do URLs Contain Two Slashes? The History and Meaning Explained
The double slash (//) in a URL marks the start of the authority component, a convention borrowed from the Apollo Domain workstation and codified in RFC 3986, and it appears only in schemes that need to contact a remote server such as HTTP, FTP, or SSH.
Apollo DomainRFC 3986Tim Berners-Lee
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