The Unity HUD (Head-Up Display) is a Unity feature in Ubuntu 12.04 LTS and later. It is supposed to replace traditional application menus with a searchable interface.

More information on the Unity HUD and the rationale behind it can be found on Mark Shuttleworth's blog here.

Mockup of the HUD from the aforementioned blog post

(A mockup of the HUD being used with Inkscape, from the aforementioned blog post)

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