<s>
The	O
following	O
is	O
a	O
list	O
of	O
operating	B-General_Concept
systems	I-General_Concept
released	O
by	O
Apple	O
Inc	O
.	O
</s>
<s>
Apple	B-Operating_System
DOS	I-Operating_System
is	O
the	O
first	O
operating	B-General_Concept
system	I-General_Concept
for	O
Apple	O
computers	O
.	O
</s>
<s>
macOS	B-Operating_System
was	O
previously	O
known	O
as	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
later	O
OS	B-Operating_System
X	I-Operating_System
.	O
</s>
<s>
macOS	B-Operating_System
Server	I-Operating_System
was	O
previously	O
known	O
as	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Server	I-Operating_System
and	O
later	O
OS	B-Operating_System
X	I-Operating_System
Server	I-Operating_System
.	O
</s>
<s>
Starting	O
with	O
Lion	B-Application
,	O
there	O
is	O
no	O
separate	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
Server	I-Operating_System
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Instead	O
the	O
server	O
components	O
are	O
a	O
separate	O
download	O
from	O
the	O
Mac	B-Application
App	I-Application
Store	I-Application
.	O
</s>
<s>
iOS	B-Application
was	O
previously	O
known	O
as	O
iPhone	B-Operating_System
OS	I-Operating_System
,	O
despite	O
also	O
being	O
available	O
on	O
the	B-Device
iPod	I-Device
Touch	O
(	O
1st	B-Device
,	O
2nd	B-Device
,	O
and	O
3rd	B-Operating_System
generations	O
)	O
and	O
the	O
original	B-Operating_System
iPad	I-Operating_System
.	O
</s>
<s>
At	O
its	O
June	O
2019	O
Worldwide	O
Developer	O
Conference	O
,	O
Apple	O
introduced	O
iPadOS	O
,	O
a	O
version	O
of	O
iOS	B-Application
,	O
for	O
iPad	B-Device
tablets	O
,	O
promised	O
for	O
fall	O
2019	O
release	O
.	O
</s>
<s>
There	O
was	O
no	O
Apple	B-Device
TV	I-Device
Software	O
8	O
,	O
version	O
8	O
was	O
skipped	O
when	O
moving	O
to	O
tvOS	B-Operating_System
.	O
</s>
<s>
Removed	O
Front	O
RowApple	O
TV	O
Software	O
3October	O
2009	O
Derived	O
from	O
Mac	B-Application
OS	I-Application
X	I-Application
10.4	I-Application
TigerApple	O
TV	O
Software	O
(	O
ARM	B-Architecture
)	O
Apple	B-Device
TV	I-Device
Software	O
4	O
Derived	O
from	O
iOS	B-Operating_System
4	I-Operating_System
and	O
iOS	B-Application
5Apple	O
TV	O
Software	O
5	O
Derived	O
from	O
iOS	B-Operating_System
5	I-Operating_System
and	O
iOS	B-Application
6Apple	O
TV	O
Software	O
6	O
Derived	O
from	O
iOS	B-Application
7Apple	O
TV	O
Software	O
7	O
Derived	O
from	O
iOS	B-Application
8tvOStvOS	O
9	O
Derived	O
from	O
iOS	B-Application
9tvOS	O
10	O
Derived	O
from	O
iOS	B-Application
10tvOS	O
11	O
Derived	O
from	O
iOS	B-Application
11tvOS	O
12	O
Derived	O
from	O
iOS	B-Application
12tvOS	O
13	O
Derived	O
from	O
iOS	B-Application
13tvOS	O
14	O
Derived	O
from	O
iOS	B-Application
14tvOS	O
15	O
Derived	O
from	O
iOS	B-Application
15tvOS	O
16	O
Derived	O
from	O
iOS	B-Application
16iOS	O
devices	O
(	O
iPhone	B-Device
,	O
iPod	B-Operating_System
Touch	I-Operating_System
,	O
and	O
iPad	B-Device
)	O
iPhone	B-Device
OSiPhone	O
OS	B-Operating_System
1	O
Derived	O
from	O
"	O
OS	B-Operating_System
X	I-Operating_System
"	O
(	O
At	O
the	O
time	O
,	O
"	O
macOS	B-Operating_System
"	O
was	O
still	O
known	O
as	O
"	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
"	O
and	O
not	O
"	O
OS	B-Operating_System
X	I-Operating_System
"	O
as	O
it	O
was	O
known	O
from	O
2012	O
to	O
2016	O
.	O
</s>
