<s>
This	O
article	O
presents	O
a	O
timeline	B-Application
of	O
events	O
in	O
the	O
history	O
of	O
computer	B-General_Concept
operating	I-General_Concept
systems	I-General_Concept
from	O
1951	O
to	O
the	O
current	O
day	O
.	O
</s>
<s>
For	O
a	O
narrative	O
explaining	O
the	O
overall	O
developments	O
,	O
see	O
the	O
History	O
of	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
LEO	B-Device
I	I-Device
'	O
Lyons	B-Device
Electronic	I-Device
Office	I-Device
 '	O
was	O
the	O
commercial	O
development	O
of	O
EDSAC	B-Device
computing	O
platform	O
,	O
supported	O
by	O
British	O
firm	O
J	O
.	O
Lyons	O
and	O
Co	O
.	O
</s>
<s>
BSD/386	B-Operating_System
,	O
by	O
BSDi	O
and	O
later	O
known	O
as	O
BSD/OS	B-Operating_System
.	O
</s>
<s>
Plan	B-Operating_System
9	I-Operating_System
Second	O
Edition	O
(	O
Commercial	O
second	O
release	O
version	O
was	O
made	O
available	O
to	O
the	O
general	O
public	O
.	O
)	O
</s>
<s>
Solaris	B-Application
7	I-Application
(	O
first	O
64-bit	B-Device
Solaris	B-Application
release	O
–	O
names	O
from	O
this	O
point	O
drop	O
"	O
2	O
.	O
</s>
<s>
Year	O
–	O
month	O
Windows	B-Application
Apple	O
BSD	B-Operating_System
Linux	B-Operating_System
Others	O
2010	O
–	O
01	O
Android	B-Application
2.1	O
AmigaOS	O
4.1	O
Upd	O
.	O
</s>
<s>
1	O
2010	O
–	O
02	O
Linux	O
2.6.33	O
2010	O
–	O
03	O
2010	O
–	O
04	O
iPhone	O
OS	O
3.2	O
DragonFly	B-Application
BSD	I-Application
2.6	O
Ubuntu	O
10.04	O
(	O
LTS	O
)	O
AmigaOS	O
4.1	O
Upd	O
.	O
</s>
<s>
2IBM	O
i	O
7.1	O
2010	O
–	O
05	O
OpenBSD	B-Operating_System
4.7	O
Linux	B-Operating_System
2.6.34Fedora	O
Linux	B-Operating_System
13Android	O
2.2	O
eComStation	B-Device
2.0	O
2010	O
–	O
06	O
iOS	B-Operating_System
4	I-Operating_System
MorphOS	B-Operating_System
2.5OpenVMS	O
8.4	O
2010	O
–	O
07	O
openSUSE	O
11.3	O
2010	O
–	O
08	O
Linux	B-Operating_System
2.6.35	O
2010	O
–	O
09	O
iOS	O
4.1	O
Solaris	B-Application
10	I-Application
9/10AIX	O
7.1	O
2010	O
–	O
10	O
Windows	B-Application
Phone	O
7	O
DragonFly	B-Application
BSD	I-Application
2.8	O
Linux	B-Operating_System
2.6.36Fedora	O
Linux	B-Operating_System
14Ubuntu	O
10.10	O
MorphOS	B-Operating_System
2.6ReactOS	O
0.3.12	O
2010	O
–	O
11	O
iOS	O
4.2	O
NetBSD	B-Device
5.1OpenBSD	O
4.8	O
Red	O
Hat	O
Enterprise	O
Linux	B-Operating_System
6	O
2010	O
–	O
12	O
Android	B-Application
2.3	O
MorphOS	B-Operating_System
2.7	O
2011	O
–	O
01	O
Linux	B-Operating_System
2.6.37	O
2011	O
–	O
02	O
Windows	B-Device
7	I-Device
Service	O
Pack	O
1	O
Debian	O
6.0Android	O
3.0	O
2011	O
–	O
03	O
Windows	B-Operating_System
CE	I-Operating_System
7.0	I-Operating_System
iOS	B-Operating_System
4.3	I-Operating_System
Linux	B-Operating_System
2.6.38openSUSE	O
11.4	O
ReactOS	B-Application
0.3.13	O
2011	O
–	O
04	O
Windows	B-Application
Home	I-Application
Server	I-Application
2011	O
DragonFly	B-Application
BSD	I-Application
2.10	O
Ubuntu	O
11.04Slackware	O
13.37	O
2011	O
–	O
05	O
OpenBSD	B-Operating_System
4.9	O
Linux	B-Operating_System
2.6.39Fedora	O
Linux	B-Operating_System
15Android	O
3.1	O
AmigaOS	O
4.1	O
Upd	O
.	O
</s>
<s>
1	O
(	O
for	O
Classic	O
)	O
eComStation	B-Device
2.1	O
2011	O
–	O
06	O
iOS	B-Operating_System
5	I-Operating_System
ChromeOS	B-Operating_System
(	O
first	O
shipped	O
)	O
9front	B-Operating_System
2011	O
–	O
07	O
Mac	B-Application
OS	I-Application
X	I-Application
Lion	I-Application
(	O
v10.7	O
)	O
Linux	B-Operating_System
3.0Android	O
3.2HP	O
webOS	B-Operating_System
3	O
AmigaOS	O
4.1	O
Upd	O
.	O
</s>
<s>
3	O
2011	O
–	O
08	O
2011	O
–	O
09	O
Windows	B-Application
Phone	O
7.5	O
2011	O
–	O
10	O
Linux	B-Operating_System
3.1Ubuntu	O
11.10Android	O
4.0	O
2011	O
–	O
11	O
OpenBSD	B-Operating_System
5.0	O
Fedora	O
Linux	B-Operating_System
16openSUSE	O
12.1	O
Solaris	B-Application
11	I-Application
11/11	O
2011	O
–	O
12	O
AmigaOS	O
4.1	O
Upd	O
.	O
</s>
<s>
4	O
2012	O
–	O
01	O
FreeBSD	B-Operating_System
9.0	O
Linux	B-Operating_System
3.2	O
FreeDOS	B-Application
1.1	O
2012	O
–	O
02	O
DragonFly	B-Application
BSD	I-Application
3.0	O
ReactOS	B-Application
0.3.14Minix	O
3.2	O
2012	O
–	O
03	O
iOS	O
5.1	O
Linux	B-Operating_System
3.3Android	O
4.0.4	O
2012	O
–	O
04	O
Ubuntu	O
12.04	O
(	O
LTS	O
)	O
2012	O
–	O
05	O
OpenBSD	B-Operating_System
5.1	O
Linux	B-Operating_System
3.4Fedora	O
Linux	B-Operating_System
17	O
DexOS	O
2012	O
–	O
06	O
BS2000/OSD	B-Application
9.0MorphOS	O
3.0	O
2012	O
–	O
07	O
OS	B-Operating_System
X	I-Operating_System
Mountain	I-Operating_System
Lion	I-Operating_System
(	O
v10.8	O
)	O
Linux	B-Operating_System
3.5Android	O
4.1openSUSE	O
12.2	O
MorphOS	B-Operating_System
3.1AmigaOS	O
4.1	O
Upd	O
.	O
</s>
