<s>
Visopsys	B-Operating_System
(	O
Visual	O
Operating	B-General_Concept
System	I-General_Concept
)	O
,	O
is	O
an	O
operating	B-General_Concept
system	I-General_Concept
,	O
written	O
by	O
Andy	O
McLaughlin	O
.	O
</s>
<s>
Development	O
of	O
the	O
operating	B-General_Concept
system	I-General_Concept
began	O
in	O
1997	O
.	O
</s>
<s>
The	O
operating	B-General_Concept
system	I-General_Concept
is	O
licensed	O
under	O
the	O
GNU	B-License
GPL	I-License
,	O
with	O
the	O
headers	O
and	O
libraries	O
under	O
the	O
less	O
restrictive	O
LGPL	B-Application
license	I-Application
.	O
</s>
<s>
It	O
runs	O
on	O
the	O
32-bit	O
IA-32	B-Device
architecture	O
.	O
</s>
<s>
It	O
features	O
a	O
multitasking	O
kernel	O
,	O
supports	O
asynchronous	B-Architecture
I/O	I-Architecture
and	O
the	O
FAT	B-Application
line	O
of	O
file	O
systems	O
.	O
</s>
<s>
It	O
requires	O
a	O
Pentium	B-General_Concept
processor	O
.	O
</s>
<s>
The	O
development	O
of	O
Visopsys	B-Operating_System
began	O
in	O
1997	O
,	O
being	O
written	O
by	O
Andy	O
McLaughlin	O
.	O
</s>
<s>
The	O
first	O
public	O
release	O
of	O
the	O
Operating	B-General_Concept
System	I-General_Concept
was	O
on	O
2	O
March	O
2001	O
,	O
with	O
version	O
0.1	O
.	O
</s>
<s>
In	O
this	O
release	O
,	O
Visopsys	B-Operating_System
was	O
a	O
32	O
bit	O
operating	B-General_Concept
system	I-General_Concept
,	O
supporting	O
preemptive	O
multitasking	O
and	O
virtual	B-Architecture
memory	I-Architecture
.	O
</s>
<s>
Visopsys	B-Operating_System
uses	O
a	O
monolithic	B-Operating_System
kernel	I-Operating_System
,	O
written	O
in	O
the	O
C	B-Language
programming	I-Language
language	I-Language
,	O
with	O
elements	O
of	O
assembly	B-Language
language	I-Language
for	O
certain	O
interactions	O
with	O
the	O
hardware	O
.	O
</s>
<s>
The	O
operating	B-General_Concept
system	I-General_Concept
supports	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
,	O
with	O
a	O
small	O
C	B-Language
library	I-Language
.	O
</s>
