<s>
SharpOS	B-Operating_System
is	O
a	O
discontinued	O
computer	B-General_Concept
operating	I-General_Concept
system	I-General_Concept
based	O
on	O
the	O
.NET	B-Application
Framework	I-Application
and	O
related	O
programming	B-General_Concept
language	O
C#	B-Application
.	O
</s>
<s>
As	O
of	O
2017	O
,	O
SharpOS	B-Operating_System
is	O
one	O
of	O
three	O
C#	B-Application
-based	O
operating	B-General_Concept
systems	I-General_Concept
released	O
under	O
a	O
free	B-License
and	I-License
open-source	I-License
software	I-License
license	O
.	O
</s>
<s>
SharpOS	B-Operating_System
has	O
only	O
one	O
public	O
version	O
available	O
.	O
</s>
<s>
and	O
a	O
basic	O
command-line	B-Application
interface	I-Application
.	O
</s>
<s>
SharpOS	B-Operating_System
began	O
in	O
November	O
2006	O
as	O
a	O
public	O
discussion	O
on	O
the	O
Mono	B-Application
development	O
mailing	O
list	O
as	O
a	O
thread	O
named	O
Operating	B-General_Concept
System	I-General_Concept
in	O
C#	B-Application
.	O
</s>
<s>
After	O
attracting	O
many	O
participants	O
,	O
Michael	O
Schurter	O
created	O
the	O
SharpOS.org	O
wiki	B-Protocol
and	O
mailing	O
list	O
to	O
continue	O
the	O
discussion	O
at	O
a	O
more	O
relevant	O
location	O
.	O
</s>
<s>
Soon	O
after	O
,	O
the	O
core	O
developers	O
(	O
Bruce	O
Markham	O
,	O
William	O
Lahti	O
,	O
Sander	O
van	O
Rossen	O
,	O
and	O
Mircea-Cristian	O
Racasan	O
)	O
decided	O
that	O
they	O
would	O
design	O
their	O
own	O
ahead-of-time	B-Application
(	O
AOT	B-Application
)	O
compiler	O
to	O
allow	O
the	O
operating	B-General_Concept
system	I-General_Concept
to	O
run	O
its	O
boot	B-Operating_System
sequence	I-Operating_System
without	O
using	O
another	O
programming	B-General_Concept
language	O
.	O
</s>
<s>
Once	O
the	O
AOT	B-Application
compiler	I-Application
was	O
developed	O
enough	O
,	O
the	O
team	O
then	O
began	O
to	O
code	O
the	O
kernel	B-Operating_System
.	O
</s>
<s>
This	O
was	O
met	O
with	O
long	O
periods	O
of	O
inactivity	O
and	O
few	O
active	O
developers	O
due	O
to	O
lack	O
of	O
interest	O
in	O
unsafe	O
kernel	B-Operating_System
programming	B-General_Concept
.	O
</s>
<s>
On	O
1	O
January	O
2008	O
,	O
the	O
SharpOS	B-Operating_System
team	O
made	O
their	O
first	O
milestone	O
release	O
public	O
,	O
this	O
is	O
the	O
first	O
version	O
of	O
the	O
software	O
to	O
appear	O
in	O
the	O
SharpOS	B-Operating_System
SourceForge	B-Application
package	O
repository	O
available	O
for	O
general	O
public	O
use	O
.	O
</s>
