<s>
OPEN	B-Operating_System
LOOK	I-Operating_System
(	O
sometimes	O
referred	O
to	O
as	O
Open	B-Operating_System
Look	I-Operating_System
)	O
is	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
specification	O
for	O
UNIX	B-Device
workstations	I-Device
.	O
</s>
<s>
OPEN	B-Operating_System
LOOK	I-Operating_System
was	O
created	O
at	O
a	O
time	O
when	O
there	O
was	O
little	O
or	O
no	O
standardization	O
in	O
Unix	B-Application
graphical	B-Application
user	I-Application
interfaces	I-Application
(	O
GUIs	B-Application
)	O
;	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
was	O
emerging	O
as	O
the	O
likely	O
de	O
facto	O
standard	O
for	O
Unix	B-Application
graphical	O
displays	O
,	O
but	O
its	O
designers	O
had	O
deliberately	O
chosen	O
not	O
to	O
specify	O
any	O
look	B-Application
and	I-Application
feel	I-Application
guidelines	O
,	O
leaving	O
this	O
up	O
to	O
application	O
and	O
window	B-Application
manager	I-Application
developers	O
.	O
</s>
<s>
At	O
the	O
same	O
time	O
,	O
there	O
was	O
increasing	O
use	O
of	O
GUIs	B-Application
in	O
non-UNIX	O
operating	O
systems	O
:	O
the	O
Apple	B-Device
Macintosh	I-Device
was	O
released	O
in	O
early	O
1984	O
,	O
followed	O
by	O
Microsoft	B-Application
Windows	I-Application
1.0	I-Application
and	O
Amiga	B-Operating_System
Workbench	I-Operating_System
in	O
1985	O
.	O
</s>
<s>
As	O
AT&T	O
contemplated	O
its	O
next	O
major	O
revision	O
to	O
Unix	B-Application
,	O
which	O
would	O
eventually	O
become	O
SVR4	O
,	O
it	O
was	O
believed	O
by	O
many	O
that	O
in	O
order	O
to	O
remain	O
competitive	O
with	O
other	O
operating	O
systems	O
,	O
Unix	B-Application
should	O
have	O
a	O
standard	O
GUI	B-Application
definition	O
.	O
</s>
<s>
One	O
other	O
concern	O
of	O
the	O
time	O
was	O
legal	O
exposure	O
surrounding	O
intellectual	O
property	O
:	O
in	O
March	O
1988	O
,	O
Apple	O
filed	O
a	O
lawsuit	O
against	O
Microsoft	O
,	O
claiming	O
that	O
Microsoft	O
had	O
copied	O
the	O
Macintosh	B-Device
look	B-Application
and	I-Application
feel	I-Application
.	O
</s>
<s>
The	O
OPEN	B-Operating_System
LOOK	I-Operating_System
specification	O
was	O
a	O
collaboration	O
between	O
Sun	O
and	O
AT&T	O
,	O
who	O
were	O
then	O
partnering	O
in	O
the	O
development	O
of	O
SVR4	O
.	O
</s>
<s>
Xerox	O
PARC	O
was	O
also	O
credited	O
for	O
having	O
not	O
only	O
done	O
the	O
pioneering	O
work	O
in	O
the	O
industry	O
for	O
graphical	B-Application
user	I-Application
interfaces	I-Application
,	O
but	O
also	O
for	O
contributing	O
to	O
OPEN	B-Operating_System
LOOK	I-Operating_System
's	O
"	O
design	O
,	O
review	O
,	O
implementation	O
,	O
testing	O
,	O
and	O
refinement	O
"	O
.	O
</s>
<s>
The	O
following	O
month	O
,	O
a	O
group	O
of	O
competitors	O
to	O
AT&T	O
and	O
Sun	O
formed	O
the	O
Open	B-Application
Software	I-Application
Foundation	I-Application
(	O
OSF	O
)	O
,	O
as	O
a	O
counter	O
to	O
their	O
collaborative	O
efforts	O
.	O
</s>
<s>
The	O
OSF	O
created	O
the	O
Motif	B-Device
GUI	B-Application
as	O
its	O
alternative	O
to	O
OPEN	B-Operating_System
LOOK	I-Operating_System
.	O
</s>
<s>
OPEN	B-Operating_System
LOOK	I-Operating_System
is	O
distinguished	O
by	O
its	O
obround	O
buttons	O
,	O
triangle	O
glyphs	O
to	O
indicate	O
pull-down	O
and	O
pull-right	O
menus	O
,	O
and	O
"	O
pushpins	O
"	O
which	O
allowed	O
the	O
user	O
to	O
make	O
dialog	O
boxes	O
and	O
palettes	O
stay	O
visible	O
.	O
</s>
<s>
In	O
fact	O
,	O
the	O
original	O
OPEN	B-Operating_System
LOOK	I-Operating_System
design	O
was	O
black	O
and	O
white	O
only	O
;	O
a	O
"	O
three-dimensional	O
"	O
look	B-Application
and	I-Application
feel	I-Application
with	O
shading	O
was	O
added	O
later	O
,	O
in	O
response	O
to	O
the	O
3-D	O
style	O
effects	O
in	O
Motif	B-Device
.	O
</s>
<s>
It	O
is	O
a	O
definition	O
of	O
a	O
look	B-Application
and	I-Application
feel	I-Application
rather	O
than	O
a	O
specific	O
implementation	O
,	O
so	O
it	O
could	O
actually	O
be	O
implemented	O
with	O
different	O
programming	O
toolkits	O
or	O
even	O
on	O
different	O
underlying	O
window	O
systems	O
;	O
implementations	O
were	O
created	O
for	O
both	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
and	O
Sun	O
's	O
NeWS	O
.	O
</s>
<s>
Sun	O
developed	O
an	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
distribution	O
implementing	O
the	O
OPEN	B-Operating_System
LOOK	I-Operating_System
look	B-Application
and	I-Application
feel	I-Application
,	O
calling	O
it	O
OpenWindows	O
.	O
</s>
<s>
Developers	O
building	O
OPEN	B-Operating_System
LOOK	I-Operating_System
applications	O
could	O
choose	O
between	O
two	O
graphical	O
programming	O
libraries	O
:	O
the	O
OPEN	B-Operating_System
LOOK	I-Operating_System
Intrinsics	O
Toolkit	O
(	O
OLIT	B-Library
)	O
or	O
XView	B-Library
.	O
</s>
<s>
The	O
former	O
was	O
built	O
on	O
the	O
Xt	B-Language
Intrinsics	I-Language
toolkit	O
common	O
to	O
X	B-Operating_System
;	O
the	O
latter	O
used	O
the	O
same	O
programming	O
interface	O
paradigm	O
as	O
the	O
GUI	B-Application
libraries	O
for	O
Sun	O
's	O
earlier	O
SunView	B-Library
window	O
system	O
,	O
making	O
it	O
relatively	O
easy	O
for	O
developers	O
to	O
migrate	O
applications	O
from	O
SunView	B-Library
to	O
X	B-Operating_System
.	O
</s>
<s>
There	O
was	O
also	O
The	O
NeWS	O
Toolkit	O
,	O
or	O
TNT	O
,	O
which	O
as	O
the	O
name	O
implies	O
implemented	O
OPEN	B-Operating_System
LOOK	I-Operating_System
for	O
NeWS	O
applications	O
;	O
support	O
for	O
NeWS	O
applications	O
was	O
removed	O
from	O
OpenWindows	O
in	O
1993	O
.	O
</s>
<s>
In	O
1990	O
,	O
Unix	B-Application
System	I-Application
Laboratories	O
(	O
USL	O
)	O
inherited	O
OLIT	B-Library
from	O
AT&T	O
along	O
with	O
UNIX	B-Application
.	O
</s>
<s>
Not	O
long	O
after	O
,	O
the	O
codebase	O
for	O
OLIT	B-Library
diverged	O
as	O
Sun	O
and	O
USL	O
took	O
its	O
development	O
in	O
different	O
directions	O
.	O
</s>
<s>
Sun	O
continued	O
to	O
enhance	O
its	O
version	O
to	O
make	O
its	O
look	B-Application
and	I-Application
feel	I-Application
more	O
consistent	O
with	O
XView	B-Library
.	O
</s>
<s>
USL	O
,	O
in	O
an	O
attempt	O
to	O
create	O
an	O
API	B-General_Concept
to	O
make	O
applications	O
GUI	B-Application
independent	O
,	O
developed	O
MoOLIT	B-Device
(	O
from	O
Motif	B-Device
OPEN	B-Operating_System
LOOK	I-Operating_System
Intrinsics	O
Toolkit	O
)	O
,	O
which	O
kept	O
the	O
OLIT	B-Library
API	B-General_Concept
,	O
but	O
allowed	O
users	O
to	O
choose	O
which	O
GUI	B-Application
they	O
wanted	O
at	O
run	O
time	O
.	O
</s>
<s>
The	O
source	O
to	O
MoOLIT	B-Device
was	O
licensed	O
by	O
MJM	O
Software	O
,	O
who	O
ported	O
it	O
to	O
several	O
other	O
Unix	B-Application
platforms	O
.	O
</s>
<s>
It	O
was	O
used	O
for	O
several	O
years	O
,	O
almost	O
exclusively	O
by	O
AT&T	O
and	O
Lucent	O
Technologies	O
,	O
who	O
wanted	O
to	O
give	O
their	O
existing	O
OPEN	B-Operating_System
LOOK	I-Operating_System
applications	O
a	O
Motif	B-Device
look	B-Application
and	I-Application
feel	I-Application
.	O
</s>
<s>
By	O
June	O
1993	O
,	O
the	O
major	O
UNIX	B-Application
players	O
,	O
including	O
AT&T	O
and	O
Sun	O
,	O
had	O
decided	O
that	O
a	O
truly	O
unified	O
Unix	B-Application
was	O
necessary	O
in	O
order	O
to	O
better	O
compete	O
against	O
Microsoft	O
and	O
had	O
formed	O
the	O
Common	B-Operating_System
Open	I-Operating_System
Software	I-Operating_System
Environment	I-Operating_System
(	O
COSE	O
)	O
initiative	O
.	O
</s>
<s>
The	O
unified	O
desktop	O
for	O
this	O
initiative	O
became	O
the	O
Common	B-Application
Desktop	I-Application
Environment	I-Application
(	O
CDE	O
)	O
,	O
and	O
the	O
look	B-Application
and	I-Application
feel	I-Application
chosen	O
for	O
it	O
was	O
based	O
on	O
Motif	B-Device
.	O
</s>
<s>
Sun	O
announced	O
its	O
plans	O
to	O
immediately	O
offer	O
Motif	B-Device
and	O
start	O
retiring	O
OpenWindows	O
,	O
by	O
then	O
the	O
predominant	O
implementation	O
of	O
the	O
OPEN	B-Operating_System
LOOK	I-Operating_System
look	B-Application
and	I-Application
feel	I-Application
.	O
</s>
<s>
Sun	O
began	O
by	O
offering	O
the	O
Motif	B-Device
developer	O
toolkit	O
and	O
MWM	B-Device
window	B-Application
manager	I-Application
as	O
a	O
standalone	O
product	O
for	O
use	O
with	O
Solaris	B-Application
until	O
CDE	O
was	O
released	O
in	O
1995	O
.	O
</s>
<s>
OpenWindows	O
remained	O
the	O
primary	O
Solaris	B-Application
desktop	O
environment	O
until	O
1997	O
,	O
when	O
CDE	O
became	O
the	O
primary	O
desktop	O
for	O
Solaris	B-Application
2.6	O
.	O
</s>
<s>
Even	O
then	O
,	O
OpenWindows	O
was	O
still	O
included	O
with	O
Solaris	B-Application
and	O
could	O
continue	O
to	O
be	O
used	O
instead	O
of	O
CDE	O
.	O
</s>
<s>
When	O
Solaris	B-Application
9	I-Application
was	O
released	O
in	O
2002	O
,	O
development	O
support	O
for	O
XView	B-Library
and	O
OLIT-based	O
applications	O
was	O
finally	O
removed	O
,	O
as	O
were	O
the	O
olwm	O
window	B-Application
manager	I-Application
and	O
the	O
OPEN	B-Operating_System
LOOK	I-Operating_System
versions	O
of	O
the	O
DeskSet	O
productivity	O
tools	O
.	O
</s>
<s>
Applications	O
already	O
developed	O
using	O
XView	B-Library
and	O
OLIT	B-Library
can	O
still	O
be	O
executed	O
and	O
displayed	O
in	O
both	O
Solaris	B-Application
9	I-Application
and	O
10	O
,	O
but	O
are	O
no	O
longer	O
supported	O
as	O
native	O
applications	O
in	O
Solaris	B-Application
11	I-Application
.	O
</s>
<s>
There	O
are	O
at	O
least	O
two	O
projects	O
continuing	O
development	O
of	O
OPEN	B-Operating_System
LOOK	I-Operating_System
software	O
:	O
"	O
OWAcomp	O
"	O
makes	O
it	O
possible	O
to	O
still	O
use	O
the	O
OPEN	B-Operating_System
LOOK	I-Operating_System
DeskSet	O
tools	O
,	O
as	O
well	O
as	O
compile	O
OPEN	B-Operating_System
LOOK	I-Operating_System
applications	O
;	O
"	O
openlook	B-Operating_System
"	O
is	O
based	O
on	O
OpenWindows	O
code	O
released	O
as	O
open	O
source	O
,	O
but	O
has	O
added	O
additional	O
components	O
that	O
were	O
not	O
open	O
sourced	O
by	O
Sun	O
.	O
</s>
