<s>
A	O
touch	B-Application
user	I-Application
interface	I-Application
(	O
TUI	O
)	O
is	O
a	O
computer-pointing	O
technology	O
based	O
upon	O
the	O
sense	O
of	O
touch	O
(	O
haptics	O
)	O
.	O
</s>
<s>
Whereas	O
a	O
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
relies	O
upon	O
the	O
sense	O
of	O
sight	O
,	O
a	O
TUI	O
enables	O
not	O
only	O
the	O
sense	O
of	O
touch	O
to	O
innervate	O
and	O
activate	O
computer-based	O
functions	O
,	O
it	O
also	O
allows	O
the	O
user	O
,	O
particularly	O
those	O
with	O
visual	O
impairments	O
,	O
an	O
added	O
level	O
of	O
interaction	O
based	O
upon	O
tactile	O
or	O
Braille	O
input	O
.	O
</s>
<s>
The	O
firmware	B-Application
located	O
within	O
the	O
IC	O
communicates	O
via	O
Universal	B-Protocol
Serial	I-Protocol
Bus	I-Protocol
(	O
USB	B-Protocol
)	O
either	O
connected	O
to	O
a	O
cable	O
,	O
or	O
using	O
a	O
wireless	O
protocol	O
adapter	O
to	O
a	O
reference	O
database	O
that	O
can	O
reside	O
on	O
media	O
within	O
a	O
computer	O
or	O
appliance	O
.	O
</s>
<s>
Upon	O
receipt	O
of	O
the	O
coordinate	O
structure	O
from	O
the	O
firmware	B-Application
,	O
the	O
database	O
correlates	O
the	O
position	O
with	O
a	O
pre-determined	O
link	O
or	O
pathway	O
to	O
digital	O
content	O
or	O
execution	O
command	O
for	O
an	O
application	O
.	O
</s>
