<s>
Disk	B-Application
Manager	I-Application
is	O
a	O
discontinued	O
software	O
(	O
that	O
was	O
a	O
popular	O
1980s	O
and	O
1990s	O
)	O
and	O
documentation	O
package	O
for	O
MS-DOS	B-Application
and	O
PC	B-Operating_System
DOS	I-Operating_System
computers	O
,	O
useful	O
for	O
self-installing	O
personal	O
computer	O
hard	B-Device
disks	I-Device
.	O
</s>
<s>
Drivers	O
could	O
be	O
either	O
DOS-type	O
,	O
or	O
replacement	O
master	B-Device
boot	I-Device
record	I-Device
code	O
.	O
</s>
<s>
Diskettes	O
with	O
Disk	B-Application
Manager	I-Application
were	O
provided	O
by	O
some	O
disk	O
manufacturers	O
(	O
e.g.	O
</s>
<s>
It	O
includes	O
DOS	O
versions	O
of	O
Ontrack	B-Application
Disk	I-Application
Manager	I-Application
and	O
Ontrack	O
Data	O
Recovery	O
.	O
</s>
<s>
Other	O
products	O
that	O
,	O
like	O
Disk	B-Application
Manager	I-Application
from	O
OnTrack	O
Computer	O
Systems	O
,	O
perform	O
hard	B-Device
drive	I-Device
geometry	O
translation	O
to	O
circumvent	O
BIOS	O
limitations	O
:	O
</s>
