<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
a	O
coprocess	B-Operating_System
is	O
a	O
process	B-Operating_System
that	O
explicitly	O
yields	O
control	O
to	O
other	O
processes	O
or	O
the	O
operating	O
system	O
.	O
</s>
<s>
In	O
Unix	B-Application
,	O
a	O
coprocess	B-Operating_System
is	O
a	O
process	B-Operating_System
that	O
sends	O
its	O
output	O
solely	O
to	O
the	O
exact	O
single	O
process	B-Operating_System
from	O
which	O
it	O
solely	O
received	O
input	O
.	O
</s>
<s>
Bash	B-Operating_System
,	O
BETA	B-Language
and	O
ksh	B-Language
have	O
language	O
constructs	O
for	O
coprocesses	O
.	O
</s>
