<s>
The	O
Macintosh	B-Device
SE	I-Device
is	O
a	O
personal	B-Device
computer	I-Device
designed	O
,	O
manufactured	O
,	O
and	O
sold	O
by	O
Apple	O
Computer	O
,	O
from	O
March	O
1987	O
to	O
October	O
1990	O
.	O
</s>
<s>
It	O
marked	O
a	O
significant	O
improvement	O
on	O
the	O
Macintosh	B-Device
Plus	I-Device
design	O
and	O
was	O
introduced	O
by	O
Apple	O
at	O
the	O
same	O
time	O
as	O
the	O
Macintosh	B-Device
II	I-Device
.	O
</s>
<s>
The	O
SE	O
retains	O
the	O
same	O
Compact	O
Macintosh	B-Device
form	O
factor	O
as	O
the	O
original	B-Device
Macintosh	I-Device
computer	O
introduced	O
three	O
years	O
earlier	O
and	O
uses	O
the	O
same	O
design	O
language	O
used	O
by	O
the	O
Macintosh	B-Device
II	I-Device
.	O
</s>
<s>
An	O
enhanced	O
model	O
,	O
the	O
SE/30	B-Device
,	O
was	O
introduced	O
in	O
January	O
1989	O
;	O
sales	O
of	O
the	O
original	O
SE	O
continued	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
SE	I-Device
was	O
updated	O
in	O
August	O
1989	O
to	O
include	O
a	O
SuperDrive	B-Device
,	O
with	O
this	O
updated	O
version	O
being	O
called	O
the	O
"	O
Macintosh	B-Device
SE	I-Device
FDHD	B-Device
"	O
and	O
later	O
the	O
"	O
Macintosh	B-Device
SE	I-Device
SuperDrive	B-Device
"	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
SE	I-Device
was	O
replaced	O
with	O
the	O
Macintosh	B-Device
Classic	I-Device
,	O
a	O
very	O
similar	O
model	O
which	O
retained	O
the	O
same	O
central	B-General_Concept
processing	I-General_Concept
unit	I-General_Concept
and	O
form	O
factor	O
,	O
but	O
at	O
a	O
lower	O
price	O
point	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
SE	I-Device
was	O
introduced	O
at	O
the	O
AppleWorld	O
conference	O
in	O
Los	O
Angeles	O
on	O
March	O
2	O
,	O
1987	O
.	O
</s>
<s>
Its	O
notable	O
new	O
features	O
,	O
compared	O
to	O
its	O
similar	O
predecessor	O
,	O
the	O
Macintosh	B-Device
Plus	I-Device
,	O
were	O
:	O
</s>
<s>
First	O
compact	O
Macintosh	B-Device
with	O
an	O
internal	O
drive	B-Device
bay	I-Device
for	O
a	O
hard	O
disk	O
(	O
originally	O
20MB	O
or	O
40MB	O
)	O
or	O
a	O
second	O
floppy	B-Device
drive	I-Device
.	O
</s>
<s>
First	O
compact	O
Macintosh	B-Device
that	O
featured	O
an	O
expansion	O
slot	O
.	O
</s>
<s>
First	O
Macintosh	B-Device
to	O
support	O
the	O
Apple	B-Device
Desktop	I-Device
Bus	I-Device
(	O
ADB	O
)	O
,	O
previously	O
only	O
available	O
on	O
the	O
Apple	B-Device
IIGS	I-Device
,	O
for	O
keyboard	O
and	O
mouse	O
connections	O
.	O
</s>
<s>
Improved	O
SCSI	B-Architecture
support	O
,	O
providing	O
faster	O
data	O
throughput	O
(	O
double	O
that	O
of	O
the	O
Macintosh	B-Device
Plus	I-Device
)	O
and	O
a	O
standard	O
50-pin	O
internal	O
SCSI	B-Architecture
connector	O
.	O
</s>
<s>
The	O
SE	O
and	O
Macintosh	B-Device
II	I-Device
were	O
the	O
first	O
Apple	O
computers	O
since	O
the	O
Apple	B-Device
I	I-Device
to	O
be	O
sold	O
without	O
a	O
keyboard	O
.	O
</s>
<s>
Instead	O
the	O
customer	O
was	O
offered	O
the	O
choice	O
of	O
the	O
new	O
ADB	O
Apple	O
Keyboard	O
or	O
the	O
Apple	B-Device
Extended	I-Device
Keyboard	I-Device
.	O
</s>
<s>
Apple	O
produced	O
ten	O
SEs	O
with	O
transparent	O
cases	O
as	O
prototypes	B-Application
for	O
promotional	O
shots	O
and	O
employees	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
SE	I-Device
shipped	O
with	O
System	B-Application
4.0	I-Application
and	O
Finder	O
5.4	O
;	O
this	O
version	O
is	O
specific	O
to	O
this	O
computer	O
.	O
</s>
<s>
(	O
The	O
Macintosh	B-Device
II	I-Device
,	O
which	O
was	O
announced	O
at	O
the	O
same	O
time	O
but	O
shipped	O
a	O
month	O
later	O
,	O
includes	O
System	O
4.1	O
and	O
Finder	O
5.5	O
.	O
)	O
</s>
<s>
The	O
README	O
file	O
included	O
with	O
the	O
installation	O
disks	O
for	O
the	O
SE	O
and	O
II	O
is	O
the	O
first	O
place	O
Apple	O
ever	O
used	O
the	O
term	O
"	O
Macintosh	B-Application
System	I-Application
Software	I-Application
"	O
,	O
and	O
after	O
1998	O
these	O
two	O
versions	O
were	O
retroactively	O
given	O
the	O
name	O
"	O
Macintosh	B-Application
System	I-Application
Software	I-Application
2.0.1	O
"	O
.	O
</s>
<s>
The	O
logic	O
board	O
has	O
four	O
30-pin	O
SIMM	B-General_Concept
slots	O
;	O
memory	O
must	O
be	O
installed	O
in	O
pairs	O
and	O
must	O
be	O
150	O
ns	O
or	O
faster	O
.	O
</s>
<s>
Storage	O
:	O
The	O
SE	O
can	O
accommodate	O
either	O
one	O
or	O
two	O
floppy	B-Device
drives	I-Device
,	O
or	O
a	O
floppy	B-Device
drive	I-Device
and	O
a	O
hard	O
drive	O
.	O
</s>
<s>
After-market	O
brackets	O
were	O
designed	O
to	O
allow	O
the	O
SE	O
to	O
accommodate	O
two	O
floppy	B-Device
drives	I-Device
as	O
well	O
as	O
a	O
hard	O
drive	O
,	O
however	O
it	O
was	O
not	O
a	O
configuration	O
supported	O
by	O
Apple	O
.	O
</s>
<s>
In	O
addition	O
an	O
external	O
floppy	B-Device
disk	I-Device
drive	I-Device
may	O
also	O
be	O
connected	O
,	O
making	O
the	O
SE	O
the	O
only	O
Macintosh	B-Device
besides	O
the	O
Macintosh	B-Device
Portable	I-Device
which	O
could	O
support	O
three	O
floppy	B-Device
drives	I-Device
,	O
though	O
its	O
increased	O
storage	O
,	O
RAM	O
capacity	O
and	O
optional	O
internal	O
hard	O
drive	O
rendered	O
the	O
external	O
drives	O
less	O
of	O
a	O
necessity	O
than	O
for	O
its	O
predecessors	O
.	O
</s>
<s>
Single-floppy	O
SE	O
models	O
also	O
featured	O
a	O
drive-access	O
light	O
in	O
the	O
spot	O
where	O
the	O
second	O
floppy	B-Device
drive	I-Device
would	O
be	O
.	O
</s>
<s>
Hard-drive	O
equipped	O
models	O
came	O
with	O
a	O
20	O
MB	O
SCSI	B-Architecture
hard	O
disk	O
.	O
</s>
<s>
Macintosh	B-Device
SE	I-Device
machines	O
which	O
have	O
sat	O
for	O
a	O
long	O
time	O
have	O
experienced	O
battery	O
corrosion	O
and	O
leakage	O
,	O
resulting	O
in	O
a	O
damaged	O
case	O
and	O
logic	O
board	O
.	O
</s>
<s>
Expansion	O
:	O
A	O
Processor	B-Device
Direct	I-Device
Slot	I-Device
on	O
the	O
logic	O
board	O
allows	O
for	O
expansion	O
cards	O
,	O
such	O
as	O
accelerators	O
,	O
to	O
be	O
installed	O
.	O
</s>
<s>
Since	O
installing	O
a	O
card	O
required	O
opening	O
the	O
computer	O
's	O
case	O
and	O
exposing	O
the	O
user	O
to	O
high	O
voltages	O
from	O
the	O
internal	O
CRT	B-Device
,	O
Apple	O
recommended	O
that	O
only	O
authorized	O
Apple	O
dealers	O
install	O
the	O
cards	O
;	O
the	O
case	O
was	O
sealed	O
with	O
then-uncommon	O
Torx	O
screws	O
.	O
</s>
<s>
Upgrades	O
:	O
After	O
Apple	O
introduced	O
the	O
Macintosh	B-Device
SE/30	I-Device
in	O
January	O
,	O
1989	O
,	O
a	O
logic	O
board	O
upgrade	O
was	O
sold	O
by	O
Apple	O
dealers	O
for	O
US$	O
1,699	O
as	O
a	O
high-cost	O
upgrade	O
for	O
the	O
SE	O
,	O
consisting	O
of	O
a	O
new	O
SE/30	B-Device
motherboard	O
,	O
case	O
front	O
and	O
internal	O
chassis	O
to	O
accommodate	O
the	O
upgrade	O
components	O
.	O
</s>
<s>
ROM/Easter	O
egg	O
:	O
The	O
SE	O
ROM	B-Device
size	O
increased	O
from	O
64	O
KB	O
in	O
the	O
original	O
Mac	O
(	O
and	O
128	O
KB	O
in	O
the	O
Mac	B-Device
Plus	I-Device
)	O
to	O
256	O
KB	O
,	O
which	O
allowed	O
the	O
development	O
team	O
to	O
include	O
an	O
Easter	O
Egg	O
hidden	O
in	O
the	O
ROMs	O
.	O
</s>
<s>
By	O
jumping	O
to	O
address	O
0x41D89A	O
(	O
or	O
reading	O
from	O
the	O
ROM	B-Device
chips	I-Device
)	O
,	O
it	O
is	O
possible	O
to	O
display	O
four	O
images	O
of	O
the	O
engineering	O
team	O
.	O
</s>
<s>
Macintosh	B-Device
SE	I-Device
1/20	O
with	O
1	O
MB	O
RAM	O
,	O
one	O
800k	O
drive	O
and	O
20	O
MB	O
hard	O
disk	O
.	O
</s>
<s>
Macintosh	B-Device
SE	I-Device
1/40	O
:	O
The	O
same	O
of	O
the	O
Macintosh	B-Device
SE	I-Device
with	O
a	O
40	O
MB	O
hard	O
disk	O
in	O
place	O
of	O
20	O
MB	O
.	O
</s>
<s>
Macintosh	B-Device
SE	I-Device
FDHD	B-Device
:	O
Includes	O
the	O
new	O
SuperDrive	B-Device
,	O
a	O
floppy	B-Device
disk	I-Device
drive	I-Device
that	O
can	O
handle	O
1.4	O
MB	O
High	O
Density	O
(	O
HD	O
)	O
floppy	B-Device
disks	I-Device
.	O
</s>
<s>
FDHD	B-Device
is	O
an	O
acronym	O
for	O
"	O
Floppy	B-Device
Disk	I-Device
High	O
Density	O
"	O
;	O
later	O
some	O
Macintosh	B-Device
SE	I-Device
FDHDs	B-Device
were	O
labeled	O
Macintosh	B-Device
SE	I-Device
SuperDrive	B-Device
,	O
to	O
conform	O
to	O
Apple	O
's	O
marketing	O
change	O
with	O
respect	O
to	O
their	O
new	O
drive	O
.	O
</s>
<s>
High-density	O
floppies	B-Device
would	O
become	O
the	O
de	O
facto	O
standard	O
on	O
both	O
the	O
Macintosh	B-Device
and	O
PC	O
computers	O
from	O
then	O
on	O
.	O
</s>
<s>
An	O
upgrade	O
kit	O
was	O
sold	O
for	O
the	O
original	B-Device
Macintosh	I-Device
SE	O
which	O
included	O
new	O
ROM	B-Device
chips	I-Device
and	O
a	O
new	O
disk	B-General_Concept
controller	I-General_Concept
chip	O
,	O
to	O
replace	O
the	O
originals	O
.	O
</s>
