<s>
A	O
chiclet	B-Device
keyboard	I-Device
or	O
island-style	B-Device
keyboard	I-Device
is	O
a	O
computer	B-Device
keyboard	I-Device
with	O
keys	O
that	O
form	O
an	O
array	O
of	O
small	O
,	O
flat	O
rectangular	O
or	O
lozenge-shaped	O
rubber	O
or	O
plastic	O
keys	O
that	O
look	O
like	O
erasers	B-Application
or	O
"	O
Chiclets	O
"	O
,	O
a	O
brand	O
of	O
chewing	O
gum	O
manufactured	O
in	O
the	O
shape	O
of	O
small	O
squares	O
with	O
rounded	O
corners	O
.	O
</s>
<s>
It	O
is	O
an	O
evolution	O
of	O
the	O
membrane	B-Device
keyboard	I-Device
,	O
using	O
the	O
same	O
principle	O
of	O
a	O
single	O
rubber	O
sheet	O
with	O
individual	O
electrical	O
switches	O
underneath	O
each	O
key	O
,	O
but	O
with	O
the	O
addition	O
of	O
an	O
additional	O
upper	O
layer	O
which	O
provides	O
superior	O
tactile	O
feedback	O
through	O
a	O
buckling	O
mechanism	O
.	O
</s>
<s>
Since	O
the	O
mid-1980s	O
,	O
chiclet	B-Device
keyboards	I-Device
have	O
been	O
mainly	O
restricted	O
to	O
lower-end	O
electronics	O
,	O
such	O
as	O
small	O
handheld	O
calculators	B-Application
,	O
cheap	O
PDAs	B-Application
and	O
many	O
remote	B-Protocol
controls	I-Protocol
,	O
though	O
the	O
name	O
is	O
also	O
used	O
to	O
refer	O
to	O
scissor	O
keyboards	B-Device
with	O
superficially	O
similar	O
appearance	O
.	O
</s>
<s>
The	O
TRS-80	B-Device
Color	I-Device
Computer	I-Device
,	O
TRS-80	B-Device
MC-10	I-Device
,	O
and	O
Timex	B-Device
Sinclair	I-Device
2068	I-Device
were	O
all	O
described	O
as	O
having	O
"	O
chiclet	O
keys	O
"	O
.	O
</s>
<s>
This	O
style	O
of	O
keyboard	B-Device
has	O
been	O
met	O
with	O
a	O
poor	O
reception	O
.	O
</s>
<s>
The	O
keys	O
on	O
ZX	B-Operating_System
Spectrum	I-Operating_System
computers	O
are	O
"	O
rubber	O
dome	O
keys	O
"	O
which	O
were	O
sometimes	O
described	O
as	O
"	O
dead	O
flesh	O
"	O
,	O
while	O
the	O
feel	O
of	O
the	O
IBM	B-Device
PCjr	I-Device
's	O
chiclet	B-Device
keyboard	I-Device
was	O
reportedly	O
compared	O
to	O
"	O
massaging	O
fruit	O
cake	O
"	O
.	O
</s>
<s>
Its	O
quality	O
was	O
such	O
that	O
an	O
amazed	O
Tandy	O
executive	O
,	O
whose	O
company	O
had	O
previously	O
released	O
a	O
computer	O
with	O
a	O
similarly	O
unpopular	O
keyboard	B-Device
,	O
asked	O
"	O
How	O
could	O
IBM	O
have	O
made	O
that	O
mistake	O
with	O
the	O
PCjr	B-Device
?	O
"	O
</s>
<s>
Chiclet	B-Device
keyboards	I-Device
operate	O
under	O
essentially	O
the	O
same	O
mechanism	O
as	O
in	O
the	O
membrane	B-Device
keyboard	I-Device
.	O
</s>
<s>
All	O
such	O
keyboards	B-Device
are	O
characterized	O
by	O
having	O
each	O
key	O
surrounded	O
(	O
and	O
held	O
in	O
place	O
)	O
by	O
a	O
perforated	O
plate	O
,	O
so	O
there	O
is	O
a	O
space	O
between	O
the	O
keys	O
.	O
</s>
<s>
Unlike	O
the	O
membrane	B-Device
keyboard	I-Device
,	O
where	O
the	O
user	O
presses	O
directly	O
onto	O
the	O
top	O
membrane	O
layer	O
,	O
this	O
form	O
of	O
chiclet	B-Device
keyboard	I-Device
places	O
a	O
set	O
of	O
moulded	O
rubber	O
keys	O
above	O
this	O
.	O
</s>
<s>
The	O
"	O
sudden	O
collapse	O
"	O
of	O
the	O
chiclet	B-Device
keyboard	I-Device
(	O
along	O
with	O
the	O
movement	O
of	O
the	O
key	O
)	O
provides	O
a	O
greater	O
tactile	O
feedback	O
to	O
the	O
user	O
than	O
a	O
simple	O
flat	O
membrane	B-Device
keyboard	I-Device
.	O
</s>
<s>
Other	O
versions	O
of	O
the	O
chiclet	B-Device
keyboard	I-Device
omit	O
the	O
upper	O
membrane	O
and	O
hole/spacer	O
layers	O
;	O
instead	O
the	O
underside	O
of	O
the	O
rubber	O
keys	O
themselves	O
have	O
a	O
conductive	O
coating	O
.	O
</s>
<s>
The	O
dome	O
switch	O
keyboards	B-Device
used	O
with	O
a	O
large	O
proportion	O
of	O
modern	O
PCs	O
are	O
technically	O
similar	O
to	O
chiclet	B-Device
keyboards	I-Device
.	O
</s>
<s>
The	O
term	O
"	O
chiclet	O
"	O
has	O
also	O
been	O
used	O
to	O
describe	O
low-profile	O
,	O
low-travel	O
scissor	O
keyboards	B-Device
with	O
simplified	O
,	O
flat	O
keycaps	O
separated	O
by	O
a	O
bezel	O
.	O
</s>
<s>
The	O
first	O
laptop	O
to	O
feature	O
this	O
style	O
of	O
chiclet	B-Device
keyboard	I-Device
was	O
the	O
Mitsubishi	B-Device
Pedion	I-Device
in	O
1997	O
(	O
rebranded	O
as	O
the	O
OmniBook	O
Sojourn	O
by	O
Hewlett-Packard	O
)	O
.	O
</s>
<s>
Sony	O
popularized	O
the	O
chiclet	B-Device
keyboard	I-Device
in	O
laptops	O
with	O
the	O
release	O
of	O
the	O
Vaio	O
X505	O
in	O
2004	O
.	O
</s>
<s>
All	O
of	O
the	O
computers	O
listed	O
are	O
from	O
the	O
early	O
home	O
computer	O
era	O
,	O
except	O
the	O
OLPC	B-Application
XO-1	I-Application
.	O
</s>
<s>
Commodore	B-Device
PET	I-Device
2001	I-Device
(	O
the	O
original	O
1977	O
PET	O
)	O
had	O
the	O
square	O
keys	O
of	O
a	O
calculator	B-Application
or	O
cash	O
register	O
.	O
</s>
