The tcp package supplies various operations on time. These predicates
can be used independently of the rest of the package. The tcp package
provides a timer scheduling facility and time conversion facilities.
Time stamping and portrayal is supplied by another library package,
namely library(date) (see lib-mis-date).
All the time predicates use an absolute time format called the
timeval/2 representation. It is a term of the form
timeval(Seconds,MicroSeconds), where Seconds
and MicroSeconds are integers representing the absolute system
time in seconds and microseconds, respectively.