Make the third bullet of 'Pragmatic Principles'

If code with a timeout completes before the timer's expiration, the timer needs to be automatically stopped and its resources returned to the system.
 

In the last paragraph, titled, Asynchronous Thread Termination change:

Although not a real-time issue, many event-driven computer systems that tightly
interact with external real-world noncomputer systems (e.g., humans, machines,
control processes, etc.) may require significant changes in their computational
behavior as a result of significant changes in the non-computer real-world system.

to

Although not a real-time issue, many event-driven computer systems that tightly
interact with external real-world noncomputer systems (e.g., humans, machines,
control processes, etc.) may require mode changes in their computational
behavior as a result of changes in the noncomputer real-world system.

AND

Consider the
opposite case. A thread or set of threads would have to be coded in such a manner so
that their computational behavior anticipated all of the possible transitions among
possible states of the external system.

to

Without this facility, a
thread or set of threads would have to be coded in such a manner so
that their computational behavior anticipated all of the possible transitions among
possible states of the external system.