<s>
The	O
Open	B-Operating_System
Architecture	I-Operating_System
System	I-Operating_System
Integration	I-Operating_System
Strategy	I-Operating_System
or	O
OASIS	B-Operating_System
Model	I-Operating_System
was	O
presented	O
by	O
Apple	O
Computer	O
as	O
the	O
philosophy	O
behind	O
the	O
Mac	O
in	O
marketing	O
beginning	O
in	O
1989	O
.	O
</s>
<s>
In	O
the	O
late	O
1980s	O
,	O
Apple	O
Computer	O
was	O
worried	O
about	O
the	O
legion	O
of	O
graphical	B-Application
user	I-Application
interfaces	I-Application
that	O
would	O
compete	O
with	O
the	O
Mac	B-Application
OS	I-Application
.	O
</s>
<s>
In	O
addition	O
to	O
improved	O
versions	O
of	O
Microsoft	B-Application
Windows	I-Application
,	O
which	O
had	O
previously	O
been	O
unsuccessful	O
,	O
they	O
were	O
now	O
facing	O
IBMs	O
Presentation	B-Device
Manager	I-Device
,	O
HP	O
's	O
NewWave	B-Application
,	O
Sun	O
Microsystems	O
 '	O
OPEN	B-Operating_System
LOOK	I-Operating_System
,	O
and	O
a	O
host	O
of	O
other	O
X11-based	O
GUIs	B-Application
on	O
various	O
Unix	B-Application
platforms	O
.	O
</s>
<s>
In	O
response	O
,	O
Apple	O
released	O
a	O
blizzard	O
of	O
marketing	O
materials	O
in	O
1989	O
trumpeting	O
Apple	O
's	O
advantage	O
,	O
the	O
OASIS	B-Operating_System
Model	I-Operating_System
.	O
</s>
<s>
In	O
the	O
documents	O
they	O
outlined	O
the	O
problems	O
with	O
grafting	O
a	O
GUI	B-Application
on	O
top	O
of	O
an	O
existing	O
operating	B-General_Concept
system	I-General_Concept
,	O
and	O
showed	O
how	O
the	O
Mac	O
's	O
"	O
all	O
in	O
one	O
"	O
design	O
allowed	O
Apple	O
to	O
produce	O
a	O
much	O
cleaner	O
system	O
.	O
</s>
<s>
OASIS	O
marketing	O
disappeared	O
with	O
the	O
release	O
of	O
System	B-Operating_System
7	I-Operating_System
in	O
1991	O
.	O
</s>
