<s>
Software	O
compatibility	B-Device
can	O
refer	O
to	O
the	O
compatibility	B-Device
that	O
a	O
particular	O
software	O
has	O
running	O
on	O
a	O
particular	O
CPU	B-General_Concept
architecture	I-General_Concept
such	O
as	O
Intel	O
or	O
PowerPC	B-Architecture
.	O
</s>
<s>
Software	O
compatibility	B-Device
can	O
also	O
refer	O
to	O
ability	O
for	O
the	O
software	O
to	O
run	O
on	O
a	O
particular	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Very	O
rarely	O
is	O
a	O
compiled	B-Application
software	I-Application
compatible	O
with	O
multiple	O
different	O
CPU	B-General_Concept
architectures	I-General_Concept
.	O
</s>
<s>
Normally	O
,	O
an	O
application	O
is	O
compiled	O
for	O
different	O
CPU	B-General_Concept
architectures	I-General_Concept
and	O
operating	B-General_Concept
systems	I-General_Concept
to	O
allow	O
it	O
to	O
be	O
compatible	O
with	O
the	O
different	O
system	O
.	O
</s>
<s>
Interpreted	B-Application
software	I-Application
,	O
on	O
the	O
other	O
hand	O
,	O
can	O
normally	O
run	O
on	O
many	O
different	O
CPU	B-General_Concept
architectures	I-General_Concept
and	O
operating	B-General_Concept
systems	I-General_Concept
if	O
the	O
interpreter	B-Application
is	O
available	O
for	O
the	O
architecture	O
or	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Software	B-Application
incompatibility	I-Application
occurs	O
many	O
times	O
for	O
new	O
software	O
released	O
for	O
a	O
newer	O
version	O
of	O
an	O
operating	B-General_Concept
system	I-General_Concept
which	O
is	O
incompatible	O
with	O
the	O
older	O
version	O
of	O
the	O
operating	B-General_Concept
system	I-General_Concept
because	O
it	O
may	O
miss	O
some	O
of	O
the	O
features	O
and	O
functionality	O
that	O
the	O
software	O
depends	O
on	O
.	O
</s>
<s>
Hardware	O
compatibility	B-Device
can	O
refer	O
to	O
the	O
compatibility	B-Device
of	I-Device
computer	I-Device
hardware	I-Device
components	O
with	O
a	O
particular	O
CPU	B-General_Concept
architecture	I-General_Concept
,	O
bus	O
,	O
motherboard	B-Device
or	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Hardware	O
that	O
is	O
compatible	O
may	O
not	O
always	O
run	O
at	O
its	O
highest	O
stated	O
performance	O
,	O
but	O
it	O
can	O
nevertheless	O
work	O
with	O
legacy	B-Device
components	I-Device
.	O
</s>
<s>
An	O
example	O
is	O
RAM	B-Architecture
chips	I-Architecture
,	O
some	O
of	O
which	O
can	O
run	O
at	O
a	O
lower	O
(	O
or	O
sometimes	O
higher	O
)	O
clock	O
rate	O
than	O
rated	O
.	O
</s>
<s>
Hardware	O
that	O
was	O
designed	O
for	O
one	O
operating	B-General_Concept
system	I-General_Concept
may	O
not	O
work	O
for	O
another	O
,	O
if	O
device	O
or	O
kernel	O
drivers	O
are	O
unavailable	O
.	O
</s>
<s>
As	O
an	O
example	O
,	O
much	O
of	O
the	O
hardware	O
for	O
macOS	B-Application
is	O
proprietary	B-Device
hardware	I-Device
with	O
drivers	O
unavailable	O
for	O
use	O
in	O
operating	B-General_Concept
systems	I-General_Concept
such	O
as	O
Linux	B-Application
.	O
</s>
