The term 'Divan' comes from the Greek word 'Divani', meaning a couch-like piece of furniture.

Divans have many, many variations as they are essentially a surface on which to place the mattress with space for storage underneath.

The image below shows a traditional Four Drawer Divan. This features two equal sized drawers on either side of the base. A Four Drawer base is not typically an option for Small Single, or Single sized beds due to the lack of space in the base.

There are many options for the Divan Base, they include:

No Drawer
2 Drawer
4 Drawer (seen below)
4 Drawer Continental (2 normal sized drawers and two smaller drawers, usually designed to accomodate bedside furniture)
End Drawer (which can also be combined with 2 side drawers).

Divan bases can also include the above options but also with the extra option of a Sprung Base, or a Platform Top/Solid Base.