In 1995, a Netscape employee engineer Brendan Eich wrote a hack in 10 days that now runs the Internet | Thirty years later, JavaScript is the glue that holds the interactive web together, warts and all.
How Netscape lives on: 30 years of shaping the web, open source, and business
The story, as best I can remember, of the origin of Mosaic and Netscape [video]