Assuming physically-intact hardware, the user 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 user shall have the ability to issue commands and receive immediate confirmation of said commands at all times, regardless of system load.



Personal computer operating systems known to obey this law:

0 (possibly 1) [*]

Notes and observations:

Right now, the only part of a standard PC which behaves this way is the power switch. And I have seen exceptions even here.

To be continued.

[*] Corrections are welcome.