<s>
A	O
driver	O
in	O
software	O
provides	O
a	O
programming	B-Application
interface	I-Application
to	O
control	O
and	O
manage	O
specific	O
lower	O
level	O
interfaces	O
that	O
are	O
often	O
linked	O
to	O
a	O
specific	O
type	O
of	O
hardware	O
,	O
or	O
other	O
low-level	O
service	O
.	O
</s>
<s>
In	O
the	O
case	O
of	O
hardware	O
,	O
the	O
specific	O
subclass	O
of	O
drivers	O
controlling	O
physical	O
or	O
virtual	O
hardware	O
devices	O
are	O
known	O
as	O
device	B-Application
drivers	I-Application
.	O
</s>
<s>
A	O
client	B-Protocol
library	B-Library
for	O
connecting	O
to	O
a	O
database	O
is	O
often	O
known	O
as	O
a	O
driver	O
,	O
for	O
example	O
the	O
MySQL	B-Application
native	O
driver	O
for	O
PHP	B-Application
.	O
</s>
