<s>
Network	B-Protocol
Control	I-Protocol
Program	I-Protocol
(	O
usually	O
given	O
as	O
NCP	O
)	O
was	O
the	O
name	O
for	O
the	O
software	O
on	O
hosts	B-Device
which	O
implemented	O
the	O
Network	B-Protocol
Control	I-Protocol
Protocol	I-Protocol
of	O
the	O
ARPANET	O
.	O
</s>
<s>
This	O
was	O
later	O
taken	O
over	O
to	O
refer	O
to	O
the	O
protocol	B-Protocol
suite	I-Protocol
itself	O
.	O
</s>
<s>
NCP	O
's	O
were	O
written	O
for	O
many	O
operating	B-General_Concept
systems	I-General_Concept
,	O
including	O
Multics	B-Application
,	O
TENEX	B-Operating_System
,	O
UNIX	B-Application
and	O
TOPS-10	B-Operating_System
,	O
and	O
many	O
of	O
those	O
NCP	O
's	O
survive	O
(	O
although	O
of	O
course	O
they	O
are	O
now	O
only	O
used	O
by	O
vintage	O
computer	O
enthusiasts	O
)	O
.	O
</s>
