<s>
The	O
Apple	B-Device
Extended	I-Device
Keyboard	I-Device
(	O
AEK	O
,	O
model	O
M0115	O
)	O
is	O
a	O
keyboard	B-Device
that	O
was	O
first	O
sold	O
separately	O
alongside	O
the	O
Macintosh	B-Device
II	I-Device
and	O
SE	B-Device
starting	O
in	O
1987	O
.	O
</s>
<s>
It	O
was	O
replaced	O
in	O
1990	O
by	O
the	O
Apple	B-Device
Extended	I-Device
Keyboard	I-Device
II	I-Device
(	O
AEKII	O
,	O
model	O
M3501	O
)	O
which	O
was	O
pre-packaged	O
with	O
Apple	O
Professional	O
Desktops	O
starting	O
with	O
the	O
Macintosh	B-Device
IIsi	I-Device
.	O
</s>
<s>
Both	O
used	O
Apple	B-Device
Desktop	I-Device
Bus	I-Device
(	O
ADB	O
)	O
to	O
connect	O
to	O
the	O
host	O
computer	O
,	O
with	O
ports	O
on	O
either	O
side	O
to	O
allow	O
daisy	O
chaining	O
of	O
another	O
input	O
device	O
,	O
typically	O
a	O
computer	B-Device
mouse	I-Device
or	O
trackball	B-Device
.	O
</s>
<s>
In	O
1994	O
,	O
Apple	O
would	O
begin	O
shipping	O
the	O
AppleDesign	O
Keyboard	B-Device
(	O
M2980	O
)	O
which	O
featured	O
only	O
one	O
ADB	B-Device
port	I-Device
and	O
which	O
used	O
rubber	O
dome	O
switches	O
rather	O
than	O
Alps	O
Electric	O
switches	O
.	O
</s>
<s>
This	O
,	O
in	O
turn	O
,	O
led	O
to	O
a	O
market	O
for	O
3rd	O
party	O
keyboards	B-Device
that	O
replicate	O
some	O
of	O
the	O
AEK	O
feel	O
,	O
with	O
Matias	O
 '	O
line	O
of	O
Tactile	O
Pro	O
and	O
Quiet	O
Pro	O
keyboards	B-Device
perhaps	O
being	O
the	O
most	O
notable	O
.	O
</s>
<s>
Among	O
the	O
features	O
that	O
make	O
this	O
keyboard	B-Device
unique	O
are	O
:	O
</s>
<s>
A	O
separate	O
power	B-Device
key	I-Device
using	O
a	O
different	O
key	O
cap	O
.	O
</s>
<s>
Large	O
spacing	O
between	O
keys	O
,	O
especially	O
the	O
top	O
function	B-Application
keys	I-Application
and	O
others	O
.	O
</s>
<s>
The	O
width	O
of	O
the	O
keyboard	B-Device
matches	O
the	O
width	O
of	O
the	O
Macintosh	B-Device
II	I-Device
.	O
</s>
<s>
The	O
height	O
allows	O
it	O
to	O
fit	O
under	O
the	O
"	O
chin	O
"	O
of	O
the	O
Macintosh	B-Device
SE	I-Device
.	O
</s>
<s>
Two	O
small	O
cylinders	O
project	O
vertically	O
from	O
the	O
top	O
of	O
the	O
keyboard	B-Device
on	O
either	O
side	O
of	O
the	O
function	B-Application
keys	I-Application
.	O
</s>
<s>
The	O
original	O
Apple	B-Device
Extended	I-Device
Keyboard	I-Device
's	O
case	O
was	O
sloped	O
upward	O
towards	O
the	O
rear	O
so	O
that	O
when	O
viewed	O
from	O
the	O
side	O
it	O
formed	O
a	O
continuous	O
convex	O
curve	O
.	O
</s>
<s>
The	O
plastic	O
of	O
the	O
case	O
shell	O
below	O
the	O
keyboard	B-Device
section	O
on	O
top	O
was	O
serrated	O
,	O
a	O
common	O
detail	O
found	O
on	O
many	O
Apple	O
products	O
of	O
the	O
era	O
.	O
</s>
<s>
Unlike	O
previous	O
Macintosh	O
keyboards	B-Device
,	O
the	O
key	O
layout	O
was	O
very	O
similar	O
to	O
the	O
IBM	B-Operating_System
PC	I-Operating_System
AT	I-Operating_System
's	O
keyboard	B-Device
,	O
in	O
order	O
to	O
improve	O
usability	O
of	O
MS-DOS	B-Application
programs	O
(	O
run	O
via	O
emulation	O
or	O
coprocessor	O
board	O
)	O
.	O
</s>
<s>
The	O
II	O
used	O
an	O
updated	O
design	O
that	O
looked	O
like	O
a	O
backward	O
S	O
when	O
viewed	O
from	O
the	O
side	O
,	O
starting	O
relatively	O
flat	O
to	O
the	O
surface	O
,	O
sloping	O
upward	O
through	O
the	O
section	O
where	O
the	O
keys	O
were	O
situated	O
,	O
and	O
then	O
flattening	O
out	O
again	O
at	O
the	O
back	O
where	O
the	O
function	B-Application
keys	I-Application
were	O
placed	O
.	O
</s>
<s>
The	O
case	O
did	O
not	O
extend	O
down	O
under	O
the	O
keyboard	B-Device
as	O
much	O
,	O
instead	O
,	O
it	O
was	O
raised	O
off	O
the	O
desk	O
by	O
an	O
adjustable	O
foot	O
at	O
the	O
back	O
.	O
</s>
<s>
The	O
design	O
patent	O
for	O
the	O
Extended	O
Keyboard	B-Device
II	O
(	O
D	O
335,228	O
)	O
was	O
filed	O
on	O
November	O
15	O
,	O
1990	O
.	O
</s>
<s>
In	O
1988	O
Apple	O
Ireland	O
commissioned	O
Design	O
ID	O
,	O
an	O
industrial	O
design	O
consultancy	O
based	O
in	O
Limerick	O
,	O
to	O
assist	O
with	O
the	O
development	O
of	O
the	O
Extended	O
Keyboard	B-Device
II	O
.	O
</s>
<s>
The	O
first	O
working	O
prototype	O
of	O
the	O
Extended	O
Keyboard	B-Device
II	O
was	O
produced	O
at	O
Design	O
ID	O
by	O
Richard	O
Howe	O
,	O
Donal	O
Ryan	O
and	O
John	O
Fitzgerald	O
.	O
</s>
