[GuiA]

From "Seven Laws of Sane Personal Computing":

I – Obeys operator

The operator shall retain full control of the machine at all times. In particular, the handling of the keyboard, mouse, and other human interface devices must take absolute priority over all other processing. The operator shall have the ability to issue commands and receive immediate confirmation of said commands at all times, regardless of system load.

http://www.loper-os.org/?p=284

[majewsky]

Off-topic: It's sad how far away we are from sane personal computing (if I may use these laws as a definition of that term).