<s>
Aviion	B-Device
(	O
styled	O
AViiON	B-Device
)	O
was	O
a	O
series	O
of	O
computers	O
from	O
Data	O
General	O
that	O
were	O
the	O
company	O
's	O
main	O
product	O
from	O
the	O
late	O
1980s	O
until	O
the	O
company	O
's	O
server	O
products	O
were	O
discontinued	O
in	O
2001	O
.	O
</s>
<s>
Earlier	O
Aviion	B-Device
models	O
used	O
the	O
Motorola	B-Architecture
88000	I-Architecture
CPU	B-Device
,	O
but	O
later	O
models	O
moved	O
to	O
an	O
all-Intel	O
solution	O
when	O
Motorola	O
stopped	O
work	O
on	O
the	O
88000	B-Architecture
in	O
the	O
early	O
1990s	O
.	O
</s>
<s>
Some	O
versions	O
of	O
these	O
later	O
Intel-based	O
machines	O
ran	O
Windows	B-Device
NT	I-Device
,	O
while	O
higher-end	O
machines	O
ran	O
the	O
company	O
's	O
flavor	O
of	O
Unix	B-Application
,	O
DG/UX	B-Operating_System
.	O
</s>
<s>
Data	O
General	O
had	O
,	O
for	O
most	O
of	O
its	O
history	O
,	O
essentially	O
mirrored	O
the	O
strategy	O
of	O
DEC	O
with	O
a	O
competitive	O
(	O
but	O
,	O
in	O
the	O
spirit	O
of	O
the	O
time	O
,	O
incompatible	O
)	O
minicomputer	B-Architecture
with	O
a	O
better	O
price/performance	O
ratio	O
.	O
</s>
<s>
However	O
,	O
by	O
the	O
1980s	O
,	O
Data	O
General	O
was	O
clearly	O
in	O
a	O
downward	O
spiral	O
relative	O
to	O
DEC	O
.	O
With	O
the	O
performance	O
of	O
custom-designed	O
minicomputer	B-Architecture
CPU	B-Device
's	O
dropping	O
relative	O
to	O
commodity	O
microprocessors	O
,	O
the	O
cost	O
of	O
developing	O
a	O
custom	O
solution	O
no	O
longer	O
paid	O
for	O
itself	O
.	O
</s>
<s>
With	O
Aviion	B-Device
,	O
DG	O
shifted	O
its	O
sight	O
from	O
a	O
purely	O
proprietary	O
minicomputer	B-Architecture
line	O
to	O
the	O
burgeoning	O
Unix	B-Application
server	O
market	O
.	O
</s>
<s>
The	O
new	O
line	O
was	O
based	O
around	O
the	O
Motorola	B-Architecture
88000	I-Architecture
,	O
a	O
high	O
performance	O
RISC	B-Architecture
processor	I-Architecture
with	O
some	O
support	O
for	O
multiprocessing	B-Operating_System
and	O
a	O
particularly	O
clean	O
architecture	O
.	O
</s>
<s>
The	O
machines	O
ran	O
a	O
System	B-Operating_System
V	I-Operating_System
Unix	I-Operating_System
variant	O
known	O
as	O
DG/UX	B-Operating_System
,	O
largely	O
developed	O
at	O
the	O
company	O
's	O
Research	O
Triangle	O
Park	O
facility	O
.	O
</s>
<s>
DG/UX	B-Operating_System
had	O
previously	O
run	O
on	O
the	O
company	O
's	O
family	O
of	O
Eclipse	B-Device
MV	I-Device
32-bit	O
minicomputers	B-Architecture
(	O
the	O
successors	O
to	O
Nova	B-Device
and	O
the	O
16-bit	O
Eclipse	B-Device
minis	O
)	O
but	O
only	O
in	O
a	O
very	O
secondary	O
role	O
to	O
the	O
Eclipse	B-Device
MV	I-Device
mainstay	O
AOS/VS	O
and	O
AOS/VS	O
II	O
operating	O
systems	O
.	O
</s>
<s>
Also	O
,	O
some	O
Aviion	B-Device
servers	O
from	O
this	O
era	O
ran	O
the	O
proprietary	O
Meditech	O
MAGIC	O
operating	O
system	O
.	O
</s>
<s>
Aviion	B-Device
were	O
released	O
in	O
a	O
variety	O
of	O
sizes	O
beginning	O
in	O
the	O
summer	O
of	O
1989	O
.	O
</s>
<s>
They	O
debuted	O
as	O
a	O
pizza	B-General_Concept
box	I-General_Concept
workstation	O
(	O
codenamed	O
"	O
Maverick	O
"	O
)	O
and	O
a	O
server	O
in	O
both	O
roller-mounted	O
and	O
rackmount	O
flavors	O
(	O
"	O
Topgun	O
"	O
)	O
.	O
</s>
<s>
Speed-bumped	O
and	O
scaled-up	O
versions	O
followed	O
,	O
culminating	O
in	O
,	O
first	O
,	O
the	O
16-CPU	O
AV/9500	O
server	O
and	O
then	O
the	O
up	O
to	O
32-way	O
AV	O
10000	O
server	O
in	O
1995	O
,	O
DG	O
's	O
first	O
implementation	O
of	O
a	O
Non-Uniform	B-Operating_System
Memory	I-Operating_System
Access	I-Operating_System
(	O
NUMA	O
)	O
design	O
.	O
</s>
<s>
In	O
1992	O
,	O
Motorola	O
joined	O
the	O
AIM	O
alliance	O
to	O
develop	O
"	O
cut	O
down	O
"	O
versions	O
of	O
the	O
IBM	B-Architecture
POWER	I-Architecture
CPU	B-Device
design	O
into	O
a	O
single-chip	O
CPU	B-Device
for	O
desktop	O
machines	O
,	O
and	O
eventually	O
stopped	O
further	O
development	O
of	O
the	O
88000	B-Architecture
.	O
</s>
<s>
Because	O
of	O
this	O
,	O
DG	O
gave	O
up	O
working	O
with	O
Motorola	O
,	O
and	O
decided	O
instead	O
to	O
align	O
its	O
efforts	O
with	O
what	O
was	O
soon	O
to	O
become	O
the	O
clear	O
winner	O
in	O
volume	O
microprocessors	O
,	O
and	O
used	O
i386	B-General_Concept
architecture	O
CPUs	B-Device
from	O
Intel	O
instead	O
.	O
</s>
<s>
This	O
resulted	O
in	O
a	O
second	O
series	O
of	O
Aviion	B-Device
machines	O
based	O
first	O
on	O
the	O
Pentium	B-General_Concept
,	O
and	O
later	O
on	O
faster	O
Pentium	B-Device
Pro	I-Device
,	O
Pentium	B-General_Concept
II	I-General_Concept
and	O
Pentium	B-General_Concept
III	I-General_Concept
Xeon	B-Device
CPUs	B-Device
.	O
</s>
<s>
This	O
more	O
commoditized	O
hardware	O
approach	O
also	O
led	O
DG	O
to	O
develop	O
NUMA	O
servers	O
that	O
added	O
a	O
memory-coherent	O
interconnect	O
(	O
Scalable	B-General_Concept
Coherent	I-General_Concept
Interconnect	I-General_Concept
(	O
SCI	O
)	O
)	O
to	O
"	O
standard	O
high-volume	O
"	O
x86	O
motherboards	O
sourced	O
from	O
Intel	O
.	O
</s>
<s>
A	O
system	O
codenamed	O
"	O
Manx	O
"	O
was	O
an	O
earlier	O
NUMA	O
effort	O
based	O
on	O
the	O
original	B-General_Concept
Pentium	I-General_Concept
and	O
Zenith	O
hardware	O
,	O
but	O
it	O
was	O
never	O
brought	O
to	O
market	O
.	O
</s>
<s>
The	O
AV	O
20000	O
(	O
"	O
Audubon	O
"	O
)	O
connected	O
to	O
32	O
Pentium	B-Device
Pro	I-Device
processors	O
(	O
on	O
up	O
to	O
eight	O
quad-processor	O
building	O
blocks	O
)	O
in	O
this	O
manner	O
;	O
the	O
later	O
AV	O
25000	O
(	O
"	O
Audubon	O
2	O
"	O
)	O
upgrade	O
expanded	O
this	O
to	O
64	O
Pentium	B-General_Concept
II	I-General_Concept
(	O
later	O
Pentium	B-General_Concept
III	I-General_Concept
)	O
Xeons	B-Device
.	O
</s>
<s>
Based	O
on	O
the	O
burgeoning	O
popularity	O
of	O
Windows	B-Device
NT	I-Device
,	O
Intel-based	O
Aviion	B-Device
servers	O
also	O
added	O
Windows	B-Application
to	O
their	O
OS	O
roster	O
across	O
the	O
Aviion	B-Device
x86	O
line	O
.	O
</s>
<s>
However	O
,	O
at	O
the	O
high-end	O
,	O
although	O
Windows	B-Device
NT	I-Device
could	O
run	O
efficiently	O
on	O
single-block	O
(	O
i.e.	O
</s>
<s>
quad-processor	O
)	O
building	O
blocks	O
in	O
NUMA	O
servers	O
,	O
it	O
did	O
not	O
at	O
the	O
time	O
have	O
the	O
processor	B-Operating_System
and	O
memory	O
affinity	O
optimizations	O
that	O
are	O
required	O
to	O
achieve	O
high	O
performance	O
on	O
larger	O
systems	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
Windows	B-Application
on	O
DG	O
NUMA	O
servers	O
was	O
always	O
more	O
of	O
a	O
marketing	O
story	O
than	O
a	O
technical	O
reality	O
.	O
</s>
<s>
Around	O
the	O
same	O
time	O
,	O
DG	O
was	O
also	O
aggressively	O
working	O
towards	O
an	O
"	O
industry	O
standard	O
"	O
Unix	B-Application
operating	I-Application
system	I-Application
with	O
the	O
Santa	O
Cruz	O
Operation	O
and	O
others	O
.	O
</s>
<s>
However	O
,	O
first	O
with	O
SCO	O
's	O
Data	O
Center	O
Acceleration	O
Program	O
(	O
DCAP	O
)	O
,	O
and	O
then	O
Project	B-Operating_System
Monterey	I-Operating_System
,	O
this	O
never	O
came	O
to	O
pass	O
.	O
</s>
<s>
Ultimately	O
,	O
DG	O
's	O
NUMA	O
servers	O
ended	O
up	O
as	O
just	O
another	O
large-scale	O
proprietary	O
Unix	B-Application
server	O
at	O
a	O
time	O
when	O
the	O
industry	O
was	O
coalescing	O
around	O
the	O
Unix	B-Application
platform	O
variants	O
of	O
just	O
a	O
few	O
large	O
vendors	O
—	O
Compaq	O
(	O
later	O
acquired	O
by	O
HP	O
)	O
,	O
HP	O
,	O
IBM	O
,	O
and	O
Sun	O
Microsystems	O
.	O
</s>
<s>
In	O
1999	O
,	O
EMC	O
purchased	O
Data	O
General	O
for	O
1.2	O
billion	O
dollars	O
primarily	O
to	O
gain	O
access	O
to	O
its	O
CLARiiON	B-Operating_System
line	O
of	O
disk	O
array	O
storage	O
products	O
and	O
associated	O
software	O
.	O
</s>
<s>
Under	O
the	O
terms	O
of	O
the	O
"	O
pooling	O
of	O
interests	O
merger	O
,	O
"	O
EMC	O
maintained	O
the	O
server	O
line	O
for	O
two	O
years	O
,	O
but	O
discontinued	O
it	O
as	O
soon	O
as	O
the	O
terms	O
of	O
the	O
deal	O
allowed	O
,	O
at	O
which	O
point	O
Aviion	B-Device
disappeared	O
.	O
</s>
