<s>
A	O
focus-plus-context	B-General_Concept
screen	I-General_Concept
is	O
a	O
specialized	O
type	O
of	O
display	B-Device
device	I-Device
that	O
consists	O
of	O
one	O
or	O
more	O
high-resolution	O
"	O
focus	O
"	O
displays	O
embedded	O
into	O
a	O
larger	O
low-resolution	O
"	O
context	O
"	O
display	O
.	O
</s>
<s>
The	O
original	O
focus-plus-context	B-General_Concept
screen	I-General_Concept
prototype	O
consisted	O
of	O
an	O
18	O
"	O
/45cm	O
LCD	O
screen	O
embedded	O
in	O
a	O
5'/150cm	O
front-projected	O
screen	O
.	O
</s>
<s>
While	O
the	O
high-resolution	O
area	O
of	O
the	O
original	O
prototype	O
was	O
located	O
at	O
a	O
fixed	O
location	O
,	O
follow-up	O
projects	O
have	O
obtained	O
a	O
movable	O
focus	O
area	O
by	O
using	O
a	O
Tablet	B-Device
PC	I-Device
.	O
</s>
<s>
Unlike	O
approaches	O
that	O
combine	O
entirety	O
and	O
details	O
in	O
software	O
(	O
fisheye	O
views	O
)	O
,	O
focus-plus-context	B-General_Concept
screens	I-General_Concept
do	O
not	O
introduce	O
distortion	O
.	O
</s>
