On the screen are some magic links. Click on a link, and you are transported instantaneously to some new place in the world of the Web.
Some links are insubstantial wisps, jumping a few paragraphs ahead or behind.
But that's not true. The documents are coded using a standard called MIME, or Multimedia Internet Mail Extensions. It's like a birthday present. The outside gift wrap is HTTP, and with the wrapper on, you don't know anything about what's inside. The box is MIME, and inside the box can be anything.