Java Tech Enthusiast

Jul 15, 2026 · Fundamentals

Why Do URLs Contain Two Slashes? The History and Purpose Explained

The article explains that the double slash in a URL marks the authority part per RFC 3986, originates from the Apollo Domain workstation syntax that Tim Berners‑Lee copied, and shows how different URI schemes use or omit it, including protocol‑relative URLs and modern browser UI quirks.