Yelp:Desktop Overview

A desktop, meant to mimic the physical top of a real-life desk in purpose, is an easy way for a user to interact with their computer, using concepts which are similar to those used when interacting with the physical world, such as buttons and windows.

The Furbuntu desktop, similar in purpose to desktops of other operating systems, falls squarely into this definition. The top panel, the desktop (proper), and a bottom panel. Other aspects of the desktops can include icons, windows, folders, wallpapers, and widgets.

Windows
A window is a visual area, usually rectangular in shape, containing some kind of user interface, displaying the output of and allowing input for one of a number of simultaneously running computer processes.

In other words, they provide an area of the screen that is specifically set aside for one program. Windows are primarily associated with graphical displays, where they can be manipulated with a pointer. These areas set aside for programs can be graphically moved around, creating a sense of depth and organization, similar to that provided by pieces of paper on a wooden desktop.

Windows can also be resized, minimized, and easily closed if a program is not needed.

Workspaces
Workspaces are areas in which a user can interact with their computer. Having multiple workspaces allows a user to move windows from one workspace to another, which can come in handy when you end up with a lot of windows on your screen.

An easy way to think of having multiple workspaces, is having multiple desks. There ends up being plenty of room to spread your work out. Furbuntu, by default, comes with two separate workspaces, and you can switch from one to the other by using the Workspace Switcher tool, which by default is located in the lower-right hand corner of your screen.