<s>
CP-6	O
is	O
a	O
discontinued	O
computer	B-General_Concept
operating	I-General_Concept
system	I-General_Concept
,	O
developed	O
by	O
Honeywell	O
,	O
Inc	O
.	O
in	O
1976	O
,	O
which	O
was	O
a	O
backward-compatible	B-General_Concept
work-alike	O
of	O
the	O
Xerox	O
CP-V	B-Operating_System
fully	O
rewritten	O
for	O
Honeywell	B-Device
Level/66	I-Device
hardware	O
.	O
</s>
<s>
CP-6	O
was	O
a	O
command	B-Application
line	I-Application
oriented	O
system	O
.	O
</s>
<s>
A	O
terminal	B-Application
emulator	I-Application
allowed	O
use	O
of	O
PCs	B-Device
as	O
CP-6	O
terminals	O
.	O
</s>
<s>
In	O
the	O
early	O
1960s	O
,	O
Honeywell	O
had	O
built	O
and	O
sold	O
a	O
large	O
number	O
of	O
H200	B-Device
machines	O
,	O
together	O
with	O
software	O
.	O
</s>
<s>
In	O
1976	O
,	O
Honeywell	O
began	O
developing	O
the	O
CP-6	O
system	O
,	O
including	O
its	O
operating	B-General_Concept
system	I-General_Concept
and	O
program	O
products	O
to	O
attract	O
Xerox	O
CP-V	B-Operating_System
users	O
(	O
about	O
750	O
Sigma	O
users	O
)	O
to	O
buy	O
and	O
use	O
Honeywell	O
equipment	O
.	O
</s>
<s>
Honeywell	O
employed	O
an	O
initial	O
team	O
of	O
60	O
programmers	O
from	O
the	O
Xerox	O
CP-V	B-Operating_System
development	O
team	O
,	O
and	O
added	O
another	O
30	O
programmers	O
plus	O
management	O
and	O
staff	O
.	O
</s>
<s>
The	O
new	O
operating	B-General_Concept
system	I-General_Concept
was	O
to	O
be	O
called	O
CP-6	O
.	O
</s>
<s>
Comshare	O
,	O
a	O
major	O
Xerox	O
customer	O
,	O
but	O
with	O
their	O
own	O
operating	B-General_Concept
system	I-General_Concept
,	O
needed	O
more	O
capacity	O
to	O
service	O
their	O
rapidly	O
expanding	O
timesharing	B-General_Concept
business	O
.	O
</s>
<s>
So	O
,	O
with	O
the	O
help	O
of	O
LADC	O
hardware	O
engineers	O
and	O
using	O
the	O
Xerox	O
specifications	O
,	O
Honeywell	O
engineers	O
in	O
Phoenix	O
built	O
30	O
Sigma	B-Device
9	I-Device
computers	O
,	O
24	O
for	O
Comshare	O
and	O
six	O
for	O
other	O
customers	O
.	O
</s>
<s>
CP-6	O
was	O
modeled	O
on	O
Xerox	O
's	O
CP-V	B-Operating_System
.	O
</s>
<s>
The	O
code	O
was	O
completely	O
rewritten	O
in	O
a	O
new	O
high-level	O
language	O
,	O
PL-6	B-Language
,	O
designed	O
and	O
built	O
expressly	O
for	O
that	O
purpose	O
,	O
rather	O
than	O
in	O
assembly	O
language	O
as	O
CP-V	B-Operating_System
had	O
been	O
,	O
because	O
of	O
increasing	O
complexities	O
of	O
the	O
new	O
virtual	O
addressing	O
hardware	O
(	O
such	O
as	O
that	O
in	O
Honeywell	O
’s	O
L66	O
and	O
DPS	O
8	O
line	O
)	O
.	O
</s>
<s>
Like	O
CP-V	B-Operating_System
,	O
CP-6	O
had	O
five	O
access	O
modes	O
,	O
which	O
operated	O
concurrently	O
:	O
batch	O
processing	O
,	O
remote	O
batch	O
,	O
timesharing	B-General_Concept
,	O
transaction	O
processing	O
,	O
and	O
real-time	O
processing	O
.	O
</s>
<s>
Also	O
like	O
CP-V	B-Operating_System
,	O
the	O
design	O
was	O
an	O
integrated	O
file	O
management	O
system	O
.	O
</s>
<s>
New	O
in	O
CP-6	O
was	O
the	O
use	O
of	O
communications	O
and	O
terminal	O
interfaces	O
through	O
minicomputer	O
(	O
Honeywell	B-Device
Level	I-Device
6	I-Device
)	O
-based	O
front-end	B-General_Concept
processors	I-General_Concept
,	O
connected	O
locally	O
,	O
remotely	O
,	O
or	O
in	O
combination	O
through	O
IMP	O
(	O
input	O
manipulation	O
processor	O
)	O
.	O
</s>
<s>
CP-6	O
included	O
an	O
integrated	O
software	O
development	O
system	O
which	O
supported	O
and	O
included	O
a	O
set	O
of	O
language	O
processors	O
:	O
APL	B-Language
,	O
BASIC	O
,	O
COBOL	B-Application
,	O
FORTRAN	B-Application
,	O
RPG	B-Language
,	O
IDP	O
,	O
IDS/II	O
,	O
SORT/MERGE	O
,	O
PL-6	B-Language
,	O
GMAP	O
,	O
and	O
a	O
text	O
formatting	O
program	O
,	O
TEXT	O
.	O
</s>
<s>
Commonly	O
needed	O
software	O
packages	O
(	O
Pascal	B-Application
,	O
SNOBOL	B-Application
,	O
LISP	B-Language
,	O
SPSS	B-Algorithm
,	O
BMDP	O
,	O
IMSL	O
,	O
SPICEII	O
,	O
and	O
SLAM	O
)	O
were	O
developed	O
by	O
Carleton	O
University	O
.	O
</s>
<s>
The	O
operating	B-General_Concept
system	I-General_Concept
supported	O
inter-system	O
communication	O
,	O
job	O
submission	O
and	O
file	O
transfer	O
between	O
CP-6	O
systems	O
and	O
between	O
CP-6	O
and	O
CP-V	B-Operating_System
and	O
to	O
and	O
from	O
IBM	O
and	O
other	O
HASP	B-Application
protocol	O
systems	O
.	O
</s>
<s>
The	O
system	O
used	O
communications	O
and	O
terminal	O
interfaces	O
through	O
a	O
Honeywell	B-Device
Level	I-Device
6	I-Device
minicomputer-based	O
front-end	B-General_Concept
processor	I-General_Concept
.	O
</s>
<s>
Asynchronous	O
,	O
bisynchronous	B-Protocol
and	O
TCP/IP	B-Protocol
communications	O
protocols	O
were	O
supported	O
.	O
</s>
<s>
A	O
high-speed	O
channel	B-Device
connected	O
this	O
host	O
to	O
a	O
Level	B-Device
6	I-Device
mini	O
computer	O
,	O
which	O
provided	O
processing	O
and	O
connection	O
for	O
terminals	O
,	O
communications	O
lines	O
,	O
and	O
high-speed	O
channel	B-Device
to	O
remote	O
computers	O
,	O
including	O
LADC	O
and	O
customers	O
for	O
on-line	O
support	O
,	O
new	O
version	O
download	O
and	O
problem	O
fix	O
patches	O
.	O
</s>
<s>
A	O
terminal	B-Application
emulator	I-Application
allowed	O
use	O
of	O
PCs	B-Device
as	O
CP-6	O
terminals	O
.	O
</s>
<s>
In	O
1979	O
or	O
1980	O
,	O
LADC	O
system	O
engineer	O
Dave	O
Platt	O
developed	O
and	O
incorporated	O
into	O
the	O
CP-6	O
operating	B-General_Concept
system	I-General_Concept
a	O
print	O
output	O
identification	O
feature	O
called	O
Edgemark	O
.	O
</s>
<s>
The	O
system	O
used	O
Honeywell	O
's	O
proprietary	B-Application
network	O
.	O
</s>
