<s>
A	O
nine-segment	B-General_Concept
display	I-General_Concept
is	O
a	O
type	O
of	O
display	O
based	O
on	O
nine	O
segments	O
that	O
can	O
be	O
turned	O
on	O
or	O
off	O
according	O
to	O
the	O
graphic	O
pattern	O
to	O
be	O
produced	O
.	O
</s>
<s>
It	O
is	O
an	O
extension	O
of	O
the	O
more	O
common	O
seven-segment	B-General_Concept
display	I-General_Concept
,	O
having	O
an	O
additional	O
two	O
diagonal	O
or	O
vertical	O
segments	O
(	O
one	O
between	O
the	O
top	O
and	O
the	O
middle	O
,	O
and	O
the	O
other	O
between	O
the	O
bottom	O
and	O
the	O
horizontal	O
segments	O
)	O
.	O
</s>
<s>
The	O
letters	O
displayed	O
by	O
a	O
nine-segment	B-General_Concept
display	I-General_Concept
are	O
not	O
consistently	O
uppercase	O
or	O
lowercase	O
in	O
shape	O
.	O
</s>
<s>
Perhaps	O
to	O
avoid	O
this	O
awkward	O
inconsistency	O
,	O
the	O
Scope	O
Geo	O
N8T	O
does	O
not	O
allow	O
the	O
use	O
of	O
uppercase	O
or	O
lowercase	O
versions	O
of	O
the	O
letters	O
"	O
J	O
"	O
(	O
even	O
though	O
it	O
could	O
easily	O
be	O
displayed	O
on	O
a	O
7-segment	B-General_Concept
display	I-General_Concept
)	O
.	O
</s>
<s>
Some	O
other	O
letters	O
like	O
"	O
K	O
"	O
,	O
"	O
Q	O
"	O
,	O
"	O
W	O
"	O
(	O
even	O
though	O
this	O
would	O
appear	O
as	O
an	O
upside-down	O
M	O
)	O
,	O
and	O
"	O
X	O
"	O
,	O
"	O
Y	O
"	O
(	O
even	O
though	O
it	O
could	O
easily	O
be	O
displayed	O
on	O
a	O
7-segment	B-General_Concept
display	I-General_Concept
)	O
,	O
and	O
"	O
Z	O
"	O
.	O
</s>
<s>
In	O
some	O
Soviet	O
digital	O
calculators	O
of	O
the	O
1970s	O
,	O
such	O
as	O
the	O
Elektronika	O
4-71b	O
,	O
9-segment	B-General_Concept
displays	I-General_Concept
were	O
used	O
to	O
provide	O
basic	O
alphanumerics	O
and	O
avoid	O
confusions	O
with	O
representing	O
numbers	O
in	O
Soviet	O
postcodes	O
.	O
</s>
<s>
The	O
Sharp	O
Compet	O
calculator	O
also	O
uses	O
a	O
9-segment	B-General_Concept
display	I-General_Concept
,	O
allowing	O
a	O
small	O
range	O
of	O
characters	O
and	O
symbols	O
to	O
be	O
used	O
.	O
</s>
<s>
Nine-segment	B-General_Concept
displays	I-General_Concept
are	O
used	O
in	O
many	O
Timex	O
digital	O
watches	O
,	O
and	O
some	O
pagers	B-Application
,	O
such	O
as	O
the	O
Nixxo	O
XPage	O
,	O
the	O
Arch	O
BR502	O
pager	B-Application
,	O
and	O
the	O
Scope	O
Geo	O
N8T	O
.	O
</s>
<s>
A	O
nine-segment	B-General_Concept
display	I-General_Concept
has	O
been	O
developed	O
for	O
displaying	O
Bengali	O
and	O
Roman	O
numerals	O
.	O
</s>
