<s>
A	O
combo	B-Device
drive	I-Device
is	O
a	O
type	O
of	O
optical	O
drive	O
that	O
combines	O
CD-R/CD	O
-RW	O
recording	O
capability	O
with	O
an	O
ability	O
to	O
read	O
(	O
but	O
not	O
write	O
)	O
DVD	O
media	O
;	O
some	O
manufacturers	O
refer	O
this	O
as	O
CD-RW/DVD	O
-ROM	O
drive	O
.	O
</s>
<s>
The	O
term	O
is	O
used	O
almost	O
exclusively	O
by	O
Apple	O
Inc	O
.	O
as	O
a	O
name	O
for	O
the	O
low-end	O
substitute	O
for	O
their	O
high-end	O
SuperDrive	B-Device
,	O
as	O
the	O
latter	O
was	O
designed	O
to	O
both	O
read	O
and	O
write	O
CD	O
and	O
DVD	O
recordable	O
media	O
.	O
</s>
<s>
The	O
device	O
was	O
created	O
as	O
a	O
mid-range	O
option	O
between	O
a	O
CD	O
burner	O
and	O
a	O
DVD	O
burner	O
,	O
which	O
at	O
the	O
time	O
the	O
combo	B-Device
drive	I-Device
was	O
introduced	O
was	O
generally	O
an	O
expensive	O
option	O
costing	O
in	O
excess	O
of	O
US$300	O
a	O
unit	O
.	O
</s>
<s>
Combo	B-Device
drives	I-Device
are	O
becoming	O
less	O
and	O
less	O
common	O
on	O
new	O
systems	O
,	O
though	O
they	O
do	O
occasionally	O
appear	O
in	O
lieu	O
of	O
CD-only	O
drives	O
on	O
low-end	O
computers	O
and	O
business	O
computers	O
to	O
lower	O
production	O
and	O
sale	O
costs	O
.	O
</s>
<s>
The	O
cost	O
difference	O
between	O
a	O
combo	B-Device
drive	I-Device
and	O
DVD	O
burner	O
has	O
been	O
steadily	O
declining	O
in	O
recent	O
years	O
,	O
so	O
most	O
new	O
PCs	O
(	O
except	O
for	O
the	O
low-end	O
budget	O
computers	O
)	O
have	O
a	O
DVD	O
burner	O
(	O
which	O
also	O
reads	O
and	O
writes	O
CDs	O
)	O
.	O
</s>
<s>
In	O
current	O
Apple	O
computers	O
,	O
none	O
of	O
them	O
contain	O
combo	B-Device
drives	I-Device
.	O
</s>
<s>
As	O
of	O
October	O
2008	O
,	O
the	O
MacBook	O
comes	O
with	O
a	O
SuperDrive	B-Device
as	O
standard	O
,	O
and	O
as	O
of	O
March	O
2009	O
,	O
the	O
Mac	O
mini	O
comes	O
with	O
a	O
SuperDrive	B-Device
as	O
opposed	O
to	O
the	O
usual	O
combo	B-Device
drive	I-Device
.	O
</s>
<s>
More	O
recently	O
the	O
term	O
"	O
combo	B-Device
drive	I-Device
"	O
is	O
used	O
to	O
refer	O
to	O
an	O
optical	O
drive	O
that	O
can	O
read	O
&	O
write	O
CDs	O
and	O
DVDs	O
,	O
but	O
only	O
read	O
Blu-ray	O
Disc/BD	O
-ROM	O
;	O
some	O
manufacturers	O
refer	O
this	O
as	O
Blu-Ray	O
Disc	O
combo	B-Device
drive	I-Device
or	O
BD-ROM/DVD	O
±	O
RW/CD	O
-RW	O
drive	O
.	O
</s>
<s>
IBM	O
has	O
launched	O
UltraSlim	O
Enhanced	O
SATA	O
Combo	B-Device
Drive	I-Device
.	O
</s>
