<s>
Intelligent	O
Input/Output	O
(	O
I2O	B-General_Concept
)	O
is	O
a	O
defunct	O
computer	O
input/output	O
(	O
I/O	O
)	O
specification	O
.	O
</s>
<s>
I2O	B-General_Concept
was	O
originally	O
designed	O
to	O
make	O
use	O
of	O
the	O
Intel	B-General_Concept
i960	I-General_Concept
microprocessor	O
as	O
the	O
I/O	O
offload	O
engine	O
,	O
bringing	O
channel	B-Device
I/O	I-Device
to	O
the	O
PC	O
.	O
</s>
<s>
I2O	B-General_Concept
emerged	O
from	O
Intel	O
in	O
the	O
mid	O
1990s	O
with	O
the	O
publication	O
of	O
the	O
I2O	B-General_Concept
specification	O
in	O
1996	O
by	O
the	O
Intelligent	O
I/O	O
Special	O
Interest	O
Group	O
,	O
which	O
dissolved	O
as	O
of	O
13	O
October	O
2000	O
.	O
</s>
<s>
I2O	B-General_Concept
's	O
principal	O
architectural	O
components	O
included	O
the	O
I/O	B-Device
processor	I-Device
(	O
IOP	O
)	O
and	O
a	O
split	O
device	O
driver	O
model	O
,	O
with	O
an	O
OSM	O
(	O
OS	O
Module	O
)	O
running	O
in	O
the	O
host	O
operating	O
system	O
and	O
a	O
HDM	O
(	O
Hardware	O
Device	O
Module	O
)	O
running	O
on	O
the	O
I/O	B-Device
processor	I-Device
.	O
</s>
<s>
This	O
split	O
is	O
suggestive	O
of	O
another	O
initiative	O
in	O
which	O
Intel	O
participated	O
at	O
the	O
time	O
,	O
the	O
Uniform	B-Application
Driver	I-Application
Interface	I-Application
(	O
UDI	O
)	O
,	O
which	O
sought	O
to	O
establish	O
a	O
common	O
device	O
driver	O
interface	O
spanning	O
multiple	O
software	O
platforms	O
.	O
</s>
<s>
I2O	B-General_Concept
was	O
plagued	O
by	O
several	O
problems	O
:	O
the	O
i960	B-General_Concept
was	O
largely	O
a	O
failure	O
and	O
I2O	B-General_Concept
made	O
systems	O
more	O
expensive	O
in	O
a	O
low	O
cost	O
marketplace	O
.	O
</s>
<s>
Additionally	O
,	O
the	O
I2O	B-General_Concept
SIG	O
was	O
seen	O
as	O
hostile	O
to	O
open	O
source	O
and	O
insensitive	O
to	O
small	O
players	O
because	O
it	O
charged	O
high	O
fees	O
for	O
participation	O
and	O
was	O
dominated	O
by	O
a	O
few	O
corporate	O
players	O
,	O
notably	O
Microsoft	O
.	O
</s>
<s>
While	O
it	O
remains	O
unclear	O
which	O
of	O
these	O
factors	O
caused	O
the	O
ultimate	O
failure	O
of	O
I2O	B-General_Concept
,	O
only	O
a	O
few	O
server	O
class	O
machines	O
were	O
ever	O
built	O
with	O
onboard	O
I2O	B-General_Concept
.	O
</s>
<s>
The	O
I2O-SIG	O
disbanded	O
in	O
October	O
2000	O
,	O
with	O
a	O
small	O
amount	O
of	O
architectural	O
information	O
being	O
made	O
available	O
via	O
FTP	O
at	O
about	O
the	O
same	O
time	O
.	O
</s>
<s>
A	O
number	O
of	O
x86-compatible	O
operating	O
systems	O
provided	O
support	O
(	O
or	O
still	O
do	O
)	O
for	O
I2O	B-General_Concept
,	O
including	O
Windows	B-Application
,	O
Linux	B-Application
(	O
removed	O
in	O
4.0	O
)	O
,	O
Solaris	B-Application
,	O
OpenBSD	B-Operating_System
,	O
and	O
NetWare	B-Operating_System
.	O
</s>
