<s>
GNU	B-Operating_System
Mach	I-Operating_System
is	O
an	O
implementation	O
of	O
the	O
Mach	B-Operating_System
microkernel	I-Operating_System
.	O
</s>
<s>
It	O
is	O
the	O
default	O
microkernel	O
in	O
the	O
GNU	B-Application
Hurd	I-Application
.	O
</s>
<s>
GNU	B-Operating_System
Mach	I-Operating_System
runs	O
on	O
IA-32	B-Device
machines	O
.	O
</s>
<s>
GNU	B-Operating_System
Mach	I-Operating_System
is	O
maintained	O
by	O
developers	O
on	O
the	B-Application
GNU	I-Application
project	I-Application
.	O
</s>
<s>
It	O
is	O
distributed	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
.	O
</s>
<s>
Early	O
versions	O
of	O
the	B-Application
Hurd	I-Application
were	O
developed	O
on	O
top	O
of	O
CMU	O
's	O
Mach	B-Operating_System
3.0	I-Operating_System
.	O
</s>
<s>
In	O
1994	O
,	O
CMU	O
stopped	O
working	O
on	O
Mach	B-Operating_System
,	O
and	O
the	B-Application
GNU	I-Application
Project	I-Application
switched	O
to	O
the	O
University	O
of	O
Utah	O
's	O
Mach	B-Operating_System
4	O
.	O
</s>
<s>
The	O
kernel	B-Operating_System
known	O
as	O
"	O
GNU	B-Operating_System
Mach	I-Operating_System
"	O
was	O
derived	O
from	O
Mach	B-Operating_System
4	O
once	O
Utah	O
stopped	O
development	O
.	O
</s>
<s>
In	O
2002	O
,	O
Roland	O
McGrath	O
branched	O
the	O
OSKit-Mach	O
branch	O
from	O
GNU	B-Operating_System
Mach	I-Operating_System
1.2	O
,	O
intending	O
to	O
replace	O
all	O
the	O
device	O
drivers	O
and	O
some	O
of	O
the	O
hardware	O
support	O
with	O
code	O
from	O
OSKit	O
.	O
</s>
<s>
After	O
the	O
release	O
of	O
GNU	B-Operating_System
Mach	I-Operating_System
1.3	O
,	O
this	O
branch	O
was	O
intended	O
to	O
become	O
the	O
GNU	B-Operating_System
Mach	I-Operating_System
2.0	O
main	O
line	O
;	O
however	O
,	O
as	O
of	O
2006	O
,	O
OSKit-Mach	O
is	O
not	O
being	O
developed	O
due	O
to	O
lack	O
of	O
activity	O
in	O
OSKit	O
itself	O
.	O
</s>
<s>
Around	O
2006	O
,	O
an	O
attempt	O
to	O
replace	O
GNU	B-Application
Hurd	I-Application
's	O
kernel	B-Operating_System
with	O
the	O
Coyotos	B-Operating_System
kernel	B-Operating_System
also	O
ended	O
in	O
failure	O
.	O
</s>
<s>
GNU	B-Operating_System
Mach	I-Operating_System
1.4	O
was	O
released	O
on	O
27	O
September	O
2013	O
,	O
eleven	O
years	O
after	O
1.3	O
.	O
</s>
<s>
Version	O
1.3	O
was	O
released	O
on	O
27	O
May	O
2002	O
,	O
and	O
features	O
advanced	O
boot	O
script	O
support	O
,	O
support	O
for	O
disks	O
larger	O
than	O
10	O
gigabytes	O
and	O
an	O
improved	O
console	B-Device
.	O
</s>
