<s>
This	O
is	O
a	O
list	B-Operating_System
of	I-Operating_System
disk	I-Operating_System
operating	I-Operating_System
systems	I-Operating_System
in	O
which	O
the	O
acronym	O
DOS	O
is	O
used	O
to	O
form	O
their	O
names	O
.	O
</s>
<s>
86-DOS	B-Operating_System
(	O
a.k.a.	O
</s>
<s>
Concurrent	B-Operating_System
DOS	I-Operating_System
(	O
a.k.a.	O
</s>
<s>
Multiuser	B-Operating_System
DOS	I-Operating_System
(	O
a.k.a.	O
</s>
<s>
Atari	B-Operating_System
DOS	I-Operating_System
,	O
from	O
Atari	O
,	O
Inc	O
.	O
</s>
<s>
DOS	O
(	O
Diskette	O
Operating	O
System	O
)	O
,	O
a	O
small	O
OS	O
for	O
16-bit	O
Data	B-Device
General	I-Device
Nova	I-Device
computers	O
,	O
a	O
cut-down	O
version	O
of	O
their	O
RDOS	B-Operating_System
.	O
</s>
<s>
NewDos/80	B-Operating_System
,	O
Apparat	O
's	O
feature-rich	O
alternative	O
to	O
TRSDOS	B-Operating_System
for	O
the	O
TRS-80	B-Device
.	O
</s>
