To put it simply, front end refers to the shiny lights you see when you click around on the Web.
Most people never see beyond the front end and know nothing of Internet history or lore.
But like a legend, BSD has many different versions. Quite frankly, until about a month ago, nobody could really figure it all out. Buried at the heart of the BSD legend is a mystery. Even front enders know about Linux, another open-source operating system. But in the mid 1990s, BSD seemed to have pulled a Jim Morrison.