<s>
Hardware-dependent	B-General_Concept
software	I-General_Concept
(	O
HDS	O
or	O
HdS	O
)	O
,	O
the	O
part	O
of	O
an	O
operating	B-General_Concept
system	I-General_Concept
that	O
varies	O
across	O
microprocessor	B-Architecture
boards	O
and	O
is	O
comprised	O
notably	O
of	O
device	B-Application
drivers	I-Application
and	O
of	O
boot	B-Application
code	O
which	O
performs	O
hardware	O
initialization	O
.	O
</s>
<s>
HDS	O
does	O
not	O
comprise	O
code	O
which	O
is	O
only	O
specific	O
to	O
a	O
processor	B-General_Concept
family	O
and	O
can	O
run	O
unchanged	O
on	O
various	O
members	O
of	O
it	O
.	O
</s>
<s>
The	O
HDS	O
is	O
alternatively	O
called	O
the	O
BSP	B-Operating_System
,	O
for	O
Board	B-Operating_System
Support	I-Operating_System
Package	I-Operating_System
,	O
especially	O
in	O
the	O
world	O
of	O
commercial	O
operating	B-General_Concept
systems	I-General_Concept
where	O
the	O
processor	B-General_Concept
family	O
code	O
is	O
distributed	O
in	O
binary	O
form	O
only	O
.	O
</s>
<s>
Often	O
software	O
that	O
runs	O
on	O
operating	B-General_Concept
systems	I-General_Concept
may	O
be	O
hardware	O
dependent	O
at	O
first	O
,	O
but	O
emulators	B-Application
can	O
reduce	O
dependencies	O
for	O
specific	O
hardware	O
.	O
</s>
