<s>
A	O
half-keyboard	B-Device
is	O
a	O
specially	O
designed	O
and	O
programmed	O
keyboard	B-Device
used	O
in	O
limited	O
space	O
situations	O
or	O
when	O
the	O
typist	O
needs	O
a	O
hand	O
free	O
to	O
answer	O
the	O
phone	O
,	O
hold	O
documents	O
,	O
etc	O
.	O
</s>
<s>
The	O
"	O
Half-QWERTY	O
"	O
keyboard	B-Device
,	O
invented	O
by	O
Edgar	O
Matias	O
,	O
consists	O
of	O
only	O
the	O
left-hand	O
half	O
of	O
a	O
normal	O
QWERTY	O
keyboard	B-Device
,	O
but	O
when	O
the	O
space	O
bar	O
is	O
held	O
down	O
,	O
it	O
switches	O
to	O
the	O
right	O
half	O
of	O
the	O
keyboard	B-Device
,	O
allowing	O
a	O
person	O
to	O
type	O
with	O
only	O
one	O
hand	O
.	O
</s>
<s>
It	O
is	O
said	O
to	O
be	O
quick	O
to	O
learn	O
,	O
because	O
our	O
bodies	O
can	O
easily	O
replicate	O
one	O
motion	O
on	O
one	O
side	O
to	O
the	O
other	O
side	O
,	O
and	O
almost	O
as	O
fast	O
as	O
a	O
normal	O
keyboard	B-Device
.	O
</s>
