[ Thanks to Falko
Timme for this link. ]
“If you have come in contact with any other operating system, be
it an older version of Ubuntu, another distribution of Linux, Mac
or Windows, you will be surprised about what the Unity desktop
looks like at first glance. The first thing to notice is the
dock-like structure on the left side of the screen.It is called launcher and is your main navigation tool on Unity.
Having dealt with previous versions of Ubuntu or Microsoft Windows,
after some browsing you will also notice that the multifunctional
control button is missing, by which you normally could access
everything there is on the computer, usually positioned in the
bottom left corner of the screen. There is kind of a control button
on the top left corner, however it does not open half the
possibilities you had with its kind before. Some of the common
options have been exported to the control panel.”