<s>
The	O
early	O
generation	O
Apple	B-Operating_System
iPhone	I-Operating_System
and	O
Nintendo	B-Operating_System
Wii	I-Operating_System
incorporated	O
accelerometers	O
.	O
</s>
<s>
Gyroscopes	B-Application
measure	O
the	O
angular	O
rate	O
of	O
rotational	O
movement	O
about	O
one	O
or	O
more	O
axes	O
.	O
</s>
<s>
Gyroscopes	B-Application
can	O
measure	O
complex	O
motion	O
accurately	O
in	O
multiple	O
dimensions	O
,	O
tracking	O
the	O
position	O
and	O
rotation	O
of	O
a	O
moving	O
object	O
unlike	O
accelerometers	O
which	O
can	O
only	O
detect	O
the	O
fact	O
that	O
an	O
object	O
has	O
moved	O
or	O
is	O
moving	O
in	O
a	O
particular	O
direction	O
.	O
</s>
<s>
Further	O
,	O
unlike	O
accelerometers	O
and	O
compasses	B-Language
,	O
gyroscopes	B-Application
are	O
not	O
affected	O
by	O
errors	O
related	O
to	O
external	O
environmental	O
factors	O
such	O
as	O
gravitational	O
and	O
magnetic	O
fields	O
.	O
</s>
<s>
Hence	O
,	O
gyroscopes	B-Application
greatly	O
enhance	O
the	O
motion	O
sensing	O
capabilities	O
of	O
devices	O
and	O
are	O
used	O
for	O
advanced	O
motion	O
sensing	O
applications	O
in	O
consumer	O
devices	O
such	O
as	O
full	O
gesture	O
and	O
movement	O
detection	O
and	O
simulation	O
in	O
video	O
gaming	O
.	O
</s>
<s>
The	B-Operating_System
Nintendo	I-Operating_System
Wii	I-Operating_System
MotionPlus	B-Application
accessory	O
and	O
the	O
Nintendo	B-Operating_System
3DS	I-Operating_System
incorporate	O
gyroscopes	B-Application
.	O
</s>
<s>
Magnetic	O
sensors	O
,	O
commonly	O
referred	O
to	O
as	O
compasses	B-Language
,	O
detect	O
magnetic	O
fields	O
and	O
measure	O
their	O
absolute	O
position	O
relative	O
to	O
Earth	O
's	O
magnetic	O
north	O
and	O
nearby	O
magnetic	O
materials	O
.	O
</s>
<s>
One	O
example	O
of	O
how	O
compass	B-Language
sensors	O
are	O
used	O
in	O
consumer	O
devices	O
is	O
reorienting	O
a	O
displayed	O
map	O
to	O
match	O
up	O
with	O
the	O
general	O
direction	O
a	O
user	O
is	O
facing	O
.	O
</s>
