<s>
Calculus	B-Operating_System
of	I-Operating_System
broadcasting	I-Operating_System
systems	I-Operating_System
(	O
CBS	O
)	O
is	O
a	O
CCS-like	O
calculus	O
where	O
processes	B-Operating_System
speak	O
one	O
at	O
a	O
time	O
and	O
each	O
is	O
heard	O
instantaneously	O
by	O
all	O
others	O
.	O
</s>
<s>
Only	O
processes	B-Operating_System
with	O
a	O
unique	O
response	O
to	O
each	O
input	O
are	O
needed	O
in	O
practice	O
,	O
so	O
weak	O
bi	O
simulation	O
is	O
a	O
congruence	O
.	O
</s>
