<s>
The	O
Compaq	B-Device
Concerto	I-Device
was	O
a	O
detachable	O
laptop	B-Device
computer	I-Device
made	O
by	O
Compaq	O
,	O
introduced	O
in	O
1993	O
.	O
</s>
<s>
Concerto	O
was	O
the	O
first	O
tablet	B-Device
computer	I-Device
manufactured	O
by	O
Compaq	O
on	O
a	O
large	O
scale	O
,	O
and	O
can	O
be	O
considered	O
a	O
very	O
early	O
form	O
of	O
a	O
2-in-1	B-Device
PC	I-Device
.	O
</s>
<s>
All	O
models	O
shipped	O
with	O
MS-DOS	B-Application
6.2	O
,	O
with	O
Compaq	O
's	O
unique	O
set	O
of	O
DOS	O
extensions	O
for	O
power	O
management	O
,	O
configuration	O
and	O
model	O
specific	O
help	O
.	O
</s>
<s>
Windows	O
for	O
PEN	O
Computing	O
Version	O
1	O
,	O
which	O
was	O
Windows	B-Application
3.1	I-Application
with	O
necessary	O
add-ons	O
for	O
pen	O
operation	O
—	O
including	O
handwriting	B-Application
recognition	I-Application
-	O
was	O
also	O
pre-installed	O
.	O
</s>
<s>
The	O
Concerto	O
was	O
not	O
a	O
very	O
successful	O
laptop	B-Device
,	O
but	O
it	O
did	O
have	O
some	O
special	O
features	O
:	O
a	O
detachable	O
keyboard	O
,	O
and	O
a	O
pen	O
&	O
touch	O
screen	O
(	O
the	O
touch	O
screen	O
only	O
worked	O
with	O
the	O
special	O
pen	O
)	O
.	O
</s>
<s>
trigger	O
tooltip	O
text	O
display	O
in	O
newer	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
