When things get too complicated, engineers usually add a layer of code to conceal the chaos.

ECONOMIST: Moving up the stack

By aiming to have one platform run across multiple device footprints, they can leverage the support and tools from the desktop version of Ubuntu and put them into a mobile device running the same code, but with a mobile UI layer on the top.

FORBES: Ubuntu Mobile Shows The Way For The Whole CE Industry

Real DVD also installs a new layer of digital-rights-management (DRM) code on files, blocking users from copying them more than five times to other computers.

FORBES: Magazine Article