<s>
SunOS	B-Operating_System
is	O
a	O
Unix-branded	O
operating	B-General_Concept
system	I-General_Concept
developed	O
by	O
Sun	O
Microsystems	O
for	O
their	O
workstation	B-Device
and	O
server	B-Application
computer	I-Application
systems	O
.	O
</s>
<s>
The	O
SunOS	B-Operating_System
name	O
is	O
usually	O
only	O
used	O
to	O
refer	O
to	O
versions	O
1.0	O
to	O
4.1.4	O
,	O
which	O
were	O
based	O
on	O
BSD	B-Operating_System
,	O
while	O
versions	O
5.0	O
and	O
later	O
are	O
based	O
on	O
UNIX	B-Operating_System
System	I-Operating_System
V	I-Operating_System
Release	O
4	O
,	O
and	O
are	O
marketed	O
under	O
the	O
brand	O
name	O
Solaris	B-Application
.	O
</s>
<s>
SunOS	B-Operating_System
version	O
Release	O
date	O
Codebase	B-General_Concept
DescriptionSun	O
UNIX	B-Application
0.71982UniSoft	O
UNIX	B-Application
v7Bundled	O
with	O
68000-based	O
Sun-1	B-Device
system	O
.	O
</s>
<s>
No	O
windowing	O
system.SunOS	O
1.0Nov	O
19834.2BSDSupport	O
for	O
68010-based	O
Sun-1	B-Device
and	O
Sun-2	B-Device
systems	O
.	O
</s>
<s>
Introduced	O
Sun	O
Window	O
System.SunOS	O
1.1Apr	O
1984SunOS	O
1.2Jan	O
1985SunOS	O
2.0May	O
1985Introduced	O
the	O
NFS	B-Protocol
protocol	I-Protocol
,	O
Yellow	B-Operating_System
Pages	I-Operating_System
(	O
YP	O
)	O
distributed	O
network	O
information	O
system	O
,	O
Remote	B-Operating_System
Procedure	I-Operating_System
Call	I-Operating_System
(	O
RPC	O
)	O
/	O
eXternal	B-Protocol
Data	I-Protocol
Representation	I-Protocol
(	O
XDR	O
)	O
and	O
virtual	B-Application
file	I-Application
system	I-Application
(	O
VFS	O
)	O
layer	O
using	O
vnodes	B-Application
.	O
</s>
<s>
Coincided	O
with	O
release	O
of	O
68020-based	O
Sun-3	B-Device
hardware	O
.	O
</s>
<s>
SunOS	B-Operating_System
3.0Feb	O
19864.2BSD	O
+	O
System	B-Operating_System
V	I-Operating_System
IPCOptional	O
System	B-Operating_System
V	I-Operating_System
tape	O
offered	O
utilities	O
and	O
development	O
libraries.SunOS	O
3.2Sep	O
1986	O
Same	O
as	O
3.0	O
,	O
plus	O
some	O
4.3BSDFirst	O
support	O
for	O
Sun-4	B-Device
seriesSunOS	O
3.5Jan	O
1988SunOS	O
4.0Dec	O
1988	O
4.3BSD	O
with	O
System	B-Operating_System
V	I-Operating_System
IPC	O
New	O
virtual	B-Architecture
memory	I-Architecture
system	O
,	O
dynamic	B-Application
linking	I-Application
,	O
automounter	O
,	O
System	B-Operating_System
V	I-Operating_System
STREAMS	B-Operating_System
I/O	O
.	O
</s>
<s>
Sun386i	B-Device
support.SunOS	O
4.0.1Dec	O
1988SunOS	O
4.0.2Sep	O
1989Sun386i	O
only	O
SunOS	B-Operating_System
4.0.3May	O
1989SunOS	O
4.0.3cJun	O
1989SPARCstation	O
1	O
(	O
Sun-4c	B-Device
)	O
only	O
SunOS	B-Operating_System
4.1Mar	O
1990SunOS	O
4.1eApr	O
1991Sun-4e	O
onlySunOS	O
4.1.1Nov	O
1990Bundled	O
with	O
OpenWindows	O
2.0SunOS	O
4.1.1BFeb	O
1991SunOS	O
4.1.1.1Jul	O
1991SunOS	O
4.1.1_U1Nov	O
1991Sun-3/3x	O
onlySunOS	O
4.1.2Dec	O
1991Support	O
for	O
multiprocessor	B-Operating_System
(	O
SPARCserver	B-Device
600MP	O
)	O
systems	O
;	O
first	O
CD-ROM-only	O
release.SunOS	O
4.1.3Aug	O
1992SunOS	O
4.1.3CNov	O
1993SPARCclassic/SPARCstation	O
LX	O
only	O
SunOS	B-Operating_System
4.1.3_U1Dec	O
1993SunOS	O
4.1.3_U1BFeb	O
1994Earliest	O
release	O
for	O
which	O
Y2K	B-Error_Name
compliance	O
patches	O
were	O
available.SunOS	O
4.1.4Nov	O
1994Last	O
release	O
of	O
SunOS	B-Operating_System
4SunOS	O
5.xJun	O
1992	O
SVR4See	O
Solaris	B-Application
article	O
.	O
</s>
<s>
SunOS1	O
only	O
supported	O
the	O
Sun-2	B-Device
series	O
systems	O
,	O
including	O
Sun-1	B-Device
systems	O
upgraded	O
with	O
Sun-2	B-Device
(	O
68010	B-Device
)	O
CPU	B-Device
boards	O
.	O
</s>
<s>
SunOS2	O
supported	O
Sun-2	B-Device
and	O
Sun-3	B-Device
(	O
68020	B-Device
)	O
series	O
systems	O
.	O
</s>
<s>
SunOS4	O
supported	O
Sun-2	B-Device
(	O
until	O
release	O
4.0.3	O
)	O
,	O
Sun-3	B-Device
(	O
until	O
4.1.1	O
)	O
,	O
Sun386i	B-Device
(	O
4.0	O
,	O
4.0.1	O
and	O
4.0.2	O
only	O
)	O
and	O
Sun-4	B-Device
(	O
SPARC	B-Architecture
)	O
architectures	O
.	O
</s>
<s>
Although	O
SunOS4	O
was	O
intended	O
to	O
be	O
the	O
first	O
release	O
to	O
fully	O
support	O
Sun	O
's	O
new	O
SPARC	B-Architecture
processor	O
,	O
there	O
was	O
also	O
a	O
SunOS3.2	O
release	O
with	O
preliminary	O
support	O
for	O
Sun-4	B-Device
systems	O
.	O
</s>
<s>
SunOS	O
4.1.2	O
introduced	O
support	O
for	O
Sun	O
's	O
first	O
sun4m-architecture	O
multiprocessor	B-Operating_System
machines	O
(	O
the	O
SPARCserver	B-Device
600MP	O
series	O
)	O
;	O
since	O
it	O
had	O
only	O
a	O
single	O
lock	B-Operating_System
for	O
the	O
kernel	O
,	O
only	O
one	O
CPU	B-Device
at	O
a	O
time	O
could	O
execute	O
in	O
the	O
kernel	O
.	O
</s>
<s>
The	O
last	O
release	O
of	O
SunOS4	O
was	O
4.1.4	O
(	O
Solaris	B-Application
1.1.2	O
)	O
in	O
1994	O
.	O
</s>
<s>
The	O
sun4	B-Device
,	O
sun4c	O
and	O
sun4m	B-Device
architectures	O
were	O
supported	O
in	O
4.1.4	O
;	O
sun4d	B-Device
was	O
not	O
supported	O
.	O
</s>
<s>
In	O
1987	O
,	O
AT&T	O
Corporation	O
and	O
Sun	O
announced	O
that	O
they	O
were	O
collaborating	O
on	O
a	O
project	O
to	O
merge	O
the	O
most	O
popular	O
Unix	B-Application
flavors	O
on	O
the	O
market	O
at	O
that	O
time	O
:	O
BSD	B-Operating_System
(	O
including	O
many	O
of	O
the	O
features	O
then	O
unique	O
to	O
SunOS	B-Operating_System
)	O
,	O
System	B-Operating_System
V	I-Operating_System
,	O
and	O
Xenix	B-Application
.	O
</s>
<s>
This	O
would	O
become	O
System	B-Operating_System
V	I-Operating_System
Release	O
4	O
(	O
SVR4	O
)	O
.	O
</s>
<s>
On	O
September	O
4	O
,	O
1991	O
,	O
Sun	O
announced	O
that	O
its	O
next	O
major	O
OS	O
release	O
would	O
switch	O
from	O
its	O
BSD-derived	O
source	O
base	O
to	O
one	O
based	O
on	O
SVR4	O
.	O
</s>
<s>
Although	O
the	O
internal	O
designation	O
of	O
this	O
release	O
would	O
be	O
SunOS	B-Operating_System
5	O
,	O
from	O
this	O
point	O
Sun	O
began	O
using	O
the	O
marketing	O
name	O
Solaris	B-Application
.	O
</s>
<s>
The	O
justification	O
for	O
this	O
new	O
"	O
overbrand	O
"	O
was	O
that	O
it	O
encompassed	O
not	O
only	O
SunOS	B-Operating_System
,	O
but	O
also	O
the	O
OpenWindows	O
desktop	O
environment	O
and	O
Open	B-Protocol
Network	I-Protocol
Computing	I-Protocol
(	O
ONC	O
)	O
functionality	O
.	O
</s>
<s>
Even	O
though	O
the	O
new	O
SVR4-based	O
OS	O
was	O
not	O
expected	O
to	O
ship	O
in	O
volume	O
until	O
the	O
following	O
year	O
,	O
Sun	O
immediately	O
began	O
using	O
the	O
new	O
Solaris	B-Application
name	O
to	O
refer	O
to	O
the	O
currently	O
shipping	O
SunOS	B-Operating_System
4	O
release	O
(	O
also	O
including	O
OpenWindows	O
)	O
.	O
</s>
<s>
Thus	O
SunOS	B-Operating_System
4.1.1	O
was	O
rebranded	O
Solaris	B-Application
1.0	O
;	O
SunOS	B-Operating_System
5.0	O
would	O
be	O
considered	O
a	O
part	O
of	O
Solaris2.0	O
.	O
</s>
<s>
SunOS4.1.x	O
micro	O
versions	O
continued	O
to	O
be	O
released	O
through	O
1994	O
,	O
and	O
each	O
of	O
these	O
was	O
also	O
given	O
a	O
Solaris	B-Application
1.x	O
equivalent	O
name	O
.	O
</s>
<s>
In	O
practice	O
,	O
these	O
were	O
often	O
still	O
referred	O
to	O
by	O
customers	O
and	O
even	O
Sun	O
personnel	O
by	O
their	O
SunOS	B-Operating_System
release	O
names	O
.	O
</s>
<s>
Today	O
,	O
SunOS5	O
is	O
universally	O
known	O
as	O
Solaris	B-Application
,	O
although	O
the	O
SunOS	B-Operating_System
name	O
is	O
still	O
visible	O
within	O
the	O
OS	O
itself	O
in	O
the	O
startup	O
banner	O
,	O
the	O
output	O
of	O
the	O
uname	B-Device
command	O
,	O
and	O
man	B-Protocol
page	I-Protocol
footers	O
,	O
among	O
other	O
places	O
.	O
</s>
<s>
Matching	O
a	O
SunOS5.x	O
release	O
to	O
its	O
corresponding	O
Solaris	B-Application
marketing	O
name	O
is	O
simple	O
:	O
each	O
Solaris	B-Application
release	O
name	O
includes	O
its	O
corresponding	O
SunOS5	O
minor	O
version	O
number	O
.	O
</s>
<s>
was	O
dropped	O
from	O
the	O
Solaris	B-Application
name	O
and	O
the	O
SunOS	B-Operating_System
minor	O
number	O
appears	O
by	O
itself	O
.	O
</s>
<s>
The	O
latest	O
Solaris	B-Application
release	O
is	O
named	O
Solaris	B-Application
11	I-Application
and	O
incorporates	O
SunOS5.11	O
.	O
</s>
<s>
Beginning	O
with	O
SunOS	B-Operating_System
1.0	O
,	O
the	O
Sun	O
Window	O
System	O
provided	O
a	O
GUI	B-Application
called	O
Suntools	B-Library
,	O
layered	O
on	O
top	O
of	O
lower-level	O
windowing	O
and	O
bitmap	O
libraries	O
;	O
this	O
was	O
renamed	O
SunView	B-Library
in	O
SunOS	B-Operating_System
3.0	O
.	O
</s>
<s>
Sun	O
then	O
developed	O
a	O
novel	O
window	O
system	O
called	O
NeWS	O
that	O
used	O
and	O
extended	O
the	O
PostScript	B-Language
language	I-Language
and	O
graphics	O
model	O
.	O
</s>
<s>
In	O
1989	O
,	O
Sun	O
released	O
OpenWindows	O
,	O
an	O
OPEN	O
LOOK-compliant	O
X11-based	O
environment	O
which	O
also	O
supported	O
SunView	B-Library
and	O
NeWS	O
applications	O
.	O
</s>
<s>
This	O
became	O
the	O
default	O
SunOS	B-Operating_System
GUI	B-Application
in	O
SunOS4.1.1	O
.	O
</s>
