<s>
A	O
display	B-Device
device	I-Device
is	O
an	O
output	B-Device
device	I-Device
for	O
presentation	O
of	O
information	O
in	O
visual	O
or	O
tactile	O
form	O
(	O
the	O
latter	O
used	O
for	O
example	O
in	O
tactile	O
electronic	B-Device
displays	I-Device
for	O
blind	O
people	O
)	O
.	O
</s>
<s>
Common	O
applications	O
for	O
electronic	O
visual	O
displays	O
are	O
television	O
sets	O
or	O
computer	B-Device
monitors	I-Device
.	O
</s>
<s>
They	O
are	O
called	O
segment	B-Device
displays	I-Device
,	O
because	O
they	O
are	O
composed	O
of	O
several	O
segments	O
that	O
switch	O
on	O
and	O
off	O
to	O
give	O
appearance	O
of	O
desired	O
glyph	B-Application
.	O
</s>
<s>
The	O
segments	O
are	O
usually	O
single	O
LEDs	O
or	O
liquid	B-Device
crystals	I-Device
.	O
</s>
<s>
Common	O
types	O
are	O
seven-segment	B-General_Concept
displays	I-General_Concept
which	O
are	O
used	O
for	O
numerals	O
only	O
,	O
and	O
alphanumeric	O
fourteen-segment	B-General_Concept
displays	I-General_Concept
and	O
sixteen-segment	B-General_Concept
displays	I-General_Concept
which	O
can	O
display	O
numerals	O
and	O
Roman	O
alphabet	O
letters	O
.	O
</s>
<s>
Cathode-ray	B-Device
tubes	I-Device
were	O
also	O
formerly	O
widely	O
used	O
.	O
</s>
<s>
The	O
multiplexed	B-General_Concept
display	I-General_Concept
technique	O
is	O
used	O
to	O
drive	O
most	O
display	B-Device
devices	I-Device
.	O
</s>
<s>
Tactile	O
electronic	B-Device
displays	I-Device
are	O
usually	O
intended	O
for	O
the	O
blind	O
.	O
</s>
