What is the name of the type of layout that asana uses in the first page? <http://asana.com/>

The layout in question is basically a long page, divided into sections in which (at least I think thats what happens) each section is more or less the size of the viewport. Sometimes parallax scrolling is included (in this case it doesn't)

This type of layout exists a lot, and its kind of a trend nowadays to do this, I don't know how they do it (without inventing the wheel all over again) and what this method is called