<s>
The	B-Device
iPod	I-Device
click	B-Device
wheel	I-Device
is	O
the	O
navigation	O
component	O
of	O
non	O
touch-screen	O
iPod	B-Operating_System
models	O
.	O
</s>
<s>
It	O
uses	O
a	O
combination	O
of	O
touch	O
technology	O
and	O
traditional	O
buttons	O
,	O
involving	O
the	O
technology	O
of	O
capacitive	B-Device
sensing	I-Device
,	O
which	O
senses	O
the	O
touch	O
of	O
the	O
user	O
's	O
fingers	O
.	O
</s>
<s>
The	O
wheel	O
is	O
flush	O
on	O
the	O
face	O
of	O
the	B-Device
iPod	I-Device
and	O
is	O
located	O
below	O
the	O
screen	O
.	O
</s>
<s>
The	O
click	B-Device
wheel	I-Device
was	O
invented	O
by	O
Norihiko	O
Saito	O
in	O
1998	O
.	O
</s>
<s>
The	O
design	O
was	O
first	O
released	O
with	O
the	B-Device
iPod	I-Device
Mini	O
,	O
and	O
was	O
last	O
used	O
with	O
the	O
(	O
non-suffixed	O
)	O
iPod	B-Operating_System
,	O
now	O
called	O
the	B-Device
iPod	I-Device
Classic	O
.	O
</s>
<s>
The	O
click	B-Device
wheel	I-Device
's	O
design	O
is	O
credited	O
to	O
Apple	O
's	O
senior	O
vice	O
president	O
of	O
worldwide	O
marketing	O
,	O
Phil	O
Schiller	O
.	O
</s>
<s>
The	O
click	B-Device
wheel	I-Device
detects	O
a	O
user	O
's	O
input	O
via	O
its	O
touch	O
sensitive	O
ring	O
.	O
</s>
<s>
The	O
primary	O
technology	O
that	O
the	O
click-wheel	O
demonstrates	O
is	O
that	O
of	O
capacitive	B-Device
sensing	I-Device
.	O
</s>
<s>
The	O
click	B-Device
wheel	I-Device
uses	O
this	O
property	O
to	O
detect	O
the	O
location	O
of	O
a	O
finger	O
,	O
since	O
the	O
human	O
body	O
has	O
capacitance	O
with	O
the	O
conductive	O
membrane	O
under	O
the	O
click	B-Device
wheel	I-Device
’s	O
plastic	O
covering	O
.	O
</s>
<s>
The	O
click	B-Device
wheel	I-Device
replaced	O
the	O
touch	O
wheel	O
starting	O
with	O
the	O
fourth-generation	O
iPod	B-Operating_System
,	O
and	O
was	O
present	O
on	O
the	O
first	O
through	O
fifth	O
generations	O
of	O
the	B-Device
iPod	I-Device
Nano	O
.	O
</s>
<s>
The	O
Creative	O
Zen	O
Touch	O
from	O
2004	O
has	O
a	O
vertical	O
scroll	O
wheel	O
similar	O
to	O
the	B-Device
iPod	I-Device
's	O
click	B-Device
wheel	I-Device
.	O
</s>
<s>
In	O
2007	O
,	O
Nokia	O
created	O
the	O
'	O
Navi	O
wheel	O
 '	O
which	O
debuted	O
on	O
the	O
Nokia	B-Language
N81	I-Language
.	O
</s>
