<s>
The	O
Macintosh	B-Device
LC	B-Device
500	O
series	O
is	O
a	O
series	O
of	O
personal	B-Device
computers	I-Device
that	O
were	O
a	O
part	O
of	O
Apple	O
Computer	O
's	O
Macintosh	B-Device
LC	I-Device
family	I-Device
of	O
Macintosh	B-Device
computers	I-Device
,	O
designed	O
as	O
a	O
successor	O
to	O
the	O
compact	O
Macintosh	B-Device
family	O
of	O
computers	O
for	O
the	O
mid-1990s	O
mainstream	O
education-market	O
.	O
</s>
<s>
The	O
all-in-one	B-Device
desktop	I-Device
case	O
is	O
similar	O
to	O
the	O
then	O
recently	O
introduced	O
Macintosh	B-Device
Color	I-Device
Classic	I-Device
,	O
but	O
the	O
LC	B-Device
500	O
series	O
is	O
considerably	O
larger	O
and	O
heavier	O
due	O
to	O
its	O
larger	O
screen	O
and	O
a	O
bulging	O
midsection	O
to	O
house	O
the	O
larger	O
electronics	O
,	O
including	O
a	O
14	O
"	O
CRT	B-Device
display	I-Device
,	O
CD-ROM	B-Device
drive	O
,	O
and	O
stereo	O
speakers	O
.	O
</s>
<s>
The	O
LC	B-Device
500	O
series	O
included	O
four	O
main	O
models	O
,	O
the	O
520	O
,	O
550	O
,	O
575	O
,	O
and	O
580	O
,	O
with	O
the	O
520	O
and	O
550	O
both	O
using	O
different	O
speeds	O
of	O
the	O
Motorola	B-Device
68030	I-Device
,	O
and	O
the	O
575	O
and	O
580	O
sharing	O
the	O
33	O
MHz	O
Motorola	O
68LC040	O
processor	B-General_Concept
but	O
differing	O
on	O
the	O
rest	O
of	O
the	O
hardware	O
.	O
</s>
<s>
All	O
of	O
these	O
computers	O
were	O
also	O
sold	O
to	O
the	O
consumer	O
market	O
through	O
department	O
stores	O
under	O
the	O
Macintosh	B-Device
Performa	I-Device
brand	O
,	O
with	O
similar	O
model	O
numbers	O
.	O
</s>
<s>
The	O
LC	B-Device
models	O
,	O
in	O
particular	O
,	O
became	O
very	O
popular	O
in	O
schools	O
for	O
their	O
small	O
footprint	O
,	O
lack	O
of	O
cable	O
clutter	O
,	O
and	O
durability	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
TV	I-Device
,	O
while	O
not	O
branded	O
as	O
an	O
LC	B-Device
,	O
uses	O
the	O
LC	B-Device
520	O
's	O
case	O
(	O
in	O
black	O
instead	O
of	O
beige	O
)	O
and	O
a	O
logic	O
board	O
similar	O
to	O
the	O
LC	B-Device
550	O
.	O
</s>
<s>
The	O
compact	O
Color	B-Device
Classic	I-Device
series	O
shares	O
many	O
components	O
,	O
and	O
is	O
able	O
to	O
swap	O
logic	O
boards	O
with	O
the	O
early	O
500	O
series	O
machines	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
LC	B-Device
520	O
was	O
introduced	O
in	O
June	O
1993	O
.	O
</s>
<s>
The	O
case	O
design	O
was	O
larger	O
than	O
the	O
compact	O
Macintosh	B-Device
models	O
that	O
precede	O
it	O
,	O
due	O
in	O
large	O
part	O
to	O
the	O
significantly	O
larger	O
screen	O
and	O
CD-ROM	B-Device
drive	O
.	O
</s>
<s>
The	O
LC	B-Device
520	O
got	O
its	O
start	O
as	O
a	O
design	O
project	O
codenamed	O
"	O
Mongo	O
"	O
.	O
</s>
<s>
Following	O
the	O
success	O
of	O
the	O
Color	B-Device
Classic	I-Device
,	O
The	O
Apple	O
Industrial	O
Design	O
Group	O
(	O
IDg	O
)	O
began	O
exploring	O
the	O
adaptation	O
of	O
the	O
Color	B-Device
Classic	I-Device
's	O
design	O
language	O
,	O
dubbed	O
Espresso	O
,	O
for	O
a	O
larger	O
display	O
version	O
that	O
would	O
also	O
include	O
a	O
CD-ROM	B-Device
drive	O
.	O
</s>
<s>
Because	O
IDg	O
universally	O
detested	O
the	O
design	O
,	O
they	O
immediately	O
began	O
the	O
re-design	O
project	O
that	O
would	O
become	O
the	O
Power	B-Device
Macintosh	I-Device
5200	I-Device
LC	I-Device
series	O
less	O
than	O
two	O
years	O
later	O
.	O
</s>
<s>
The	O
LC	B-Device
520	O
has	O
been	O
described	O
as	O
if	O
you	O
"	O
take	O
an	O
LC	B-Device
III	I-Device
and	O
graft	O
on	O
a	O
14″	O
Trinitron	O
monitor	O
along	O
with	O
stereo	O
speakers	O
"	O
.	O
</s>
<s>
The	O
logic	O
board	O
of	O
the	O
520	O
is	O
broadly	O
the	O
same	O
as	O
the	O
Macintosh	B-Device
LC	I-Device
III	I-Device
,	O
with	O
a	O
Motorola	B-Device
68030	I-Device
CPU	B-General_Concept
and	O
an	O
optional	O
Motorola	B-General_Concept
68882	I-General_Concept
FPU	B-General_Concept
.	O
</s>
<s>
A	O
New	O
York	O
Times	O
review	O
of	O
the	O
LC	B-Device
520	O
was	O
generally	O
positive	O
,	O
with	O
columnist	O
Peter	O
Lewis	O
noting	O
that	O
its	O
$	O
1,599	O
price	O
point	O
is	O
"	O
perhaps	O
the	O
best	O
value	O
in	O
the	O
entire	O
Macintosh	B-Device
product	O
line	O
...	O
it	O
would	O
be	O
very	O
difficult	O
to	O
put	O
together	O
a	O
Windows-based	O
PC	O
with	O
the	O
same	O
features	O
for	O
that	O
price	O
,	O
and	O
Windows	O
computers	O
are	O
usually	O
much	O
less	O
expensive	O
than	O
Macs.	O
"	O
</s>
<s>
Lewis	O
also	O
noted	O
that	O
the	O
unit	O
's	O
40-pound	O
weight	O
would	O
make	O
it	O
difficult	O
to	O
carry	O
home	O
at	O
night	O
--	O
an	O
attribute	O
that	O
Apple	O
had	O
previously	O
marketed	O
as	O
a	O
feature	O
of	O
compact	O
Macintosh	B-Device
models	O
in	O
the	O
1980s	O
.	O
</s>
<s>
MacWEEK	O
wrote	O
that	O
the	O
timing	O
of	O
the	O
LC	B-Device
520	O
's	O
release	O
coincided	O
with	O
purchasing	O
timelines	O
for	O
schools	O
,	O
and	O
that	O
the	O
decision	O
to	O
market	O
the	O
computer	O
exclusively	O
to	O
the	O
education	O
market	O
was	O
part	O
of	O
a	O
strategic	O
shift	O
to	O
move	O
the	O
LC	B-Device
brand	O
away	O
from	O
the	O
retail	O
market	O
.	O
</s>
<s>
The	O
LC	B-Device
520	O
was	O
discontinued	O
in	O
February	O
1994	O
,	O
when	O
it	O
was	O
replaced	O
by	O
both	O
the	O
faster	O
but	O
otherwise	O
essentially	O
unchanged	O
Macintosh	B-Device
LC	B-Device
550	O
and	O
the	O
new	O
,	O
68LC040-equipped	O
Macintosh	B-Device
LC	B-Device
575	O
.	O
</s>
<s>
Apple	O
sold	O
upgrade	O
kits	O
for	O
the	O
LC	B-Device
520	O
that	O
brought	O
it	O
to	O
the	O
same	O
specifications	O
as	O
the	O
LC	B-Device
550	O
or	O
575	O
.	O
</s>
<s>
Featured	O
a	O
caddy-loaded	O
CD-ROM	B-Device
drive	O
.	O
</s>
<s>
Macintosh	B-Device
LC	B-Device
520	O
:	O
5	O
MB	O
RAM	B-Architecture
,	O
80	O
MB	O
HDD	O
.	O
</s>
<s>
Macintosh	B-Device
Performa	I-Device
520	O
:	O
Consumer	O
version	O
of	O
the	O
LC	B-Device
520	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
LC	B-Device
550	O
replaced	O
the	O
LC	B-Device
520	O
in	O
February	O
1994	O
.	O
</s>
<s>
The	O
Performa	B-Device
variants	O
were	O
introduced	O
earlier	O
,	O
the	O
550	O
in	O
October	O
1993	O
and	O
the	O
560	O
in	O
January	O
1994	O
,	O
and	O
remained	O
available	O
for	O
more	O
than	O
a	O
year	O
longer	O
,	O
until	O
April	O
1996	O
.	O
</s>
<s>
The	O
main	O
difference	O
between	O
the	O
550	O
and	O
the	O
520	O
is	O
the	O
faster	O
68030	B-Device
CPU	B-General_Concept
,	O
clocked	O
at	O
33	O
MHz	O
instead	O
of	O
25	O
MHz	O
,	O
with	O
the	O
bus	B-Architecture
speed	O
also	O
increasing	O
from	O
25	O
to	O
33	O
MHz	O
.	O
</s>
<s>
The	O
logic	O
board	O
in	O
the	O
550	O
is	O
essentially	O
the	O
same	O
one	O
used	O
in	O
the	O
Macintosh	B-Device
Color	I-Device
Classic	I-Device
II	I-Device
,	O
an	O
upgrade	O
to	O
the	O
original	O
Color	B-Device
Classic	I-Device
not	O
available	O
in	O
the	O
United	O
States	O
.	O
</s>
<s>
Apple	O
also	O
offered	O
the	O
same	O
upgrade	O
package	O
for	O
the	O
520	O
to	O
the	O
LC	B-Device
575	O
logic	O
board	O
.	O
</s>
<s>
Two	O
Performa	B-Device
variants	O
were	O
introduced	O
,	O
varying	O
only	O
in	O
the	O
software	O
bundle	O
that	O
was	O
included	O
.	O
</s>
<s>
The	O
Performa	B-Device
560	O
was	O
called	O
the	O
"	O
Money	O
Edition	O
"	O
owing	O
to	O
a	O
partnership	O
between	O
Apple	O
and	O
Money	O
magazine	O
.	O
</s>
<s>
Macintosh	B-Device
Performa	I-Device
550	O
:	O
160	O
MB	O
HDD	O
.	O
</s>
<s>
Macintosh	B-Device
Performa	I-Device
560	O
Money	O
Edition	O
:	O
The	O
Performa	B-Device
550	O
with	O
bundled	O
business	O
software	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
LC	B-Device
575	O
was	O
available	O
from	O
1994	O
to	O
1996	O
.	O
</s>
<s>
It	O
retains	O
the	O
"	O
all-in-one	O
"	O
case	O
of	O
the	O
LC	B-Device
520/550	O
,	O
but	O
uses	O
the	O
LC	B-Device
475	I-Device
's	O
architecture	O
with	O
a	O
Motorola	O
68LC040	O
CPU	B-General_Concept
(	O
at	O
a	O
speed	O
of	O
33	O
MHz	O
instead	O
of	O
25	O
MHz	O
)	O
and	O
a	O
tray-loading	O
optical	O
drive	O
.	O
</s>
<s>
The	O
CPU	B-General_Concept
clock	O
is	O
sometimes	O
given	O
as	O
66	O
MHz	O
,	O
since	O
the	O
clock	O
signal	O
is	O
of	O
that	O
frequency	O
-	O
however	O
,	O
the	O
processor	B-General_Concept
itself	O
only	O
runs	O
at	O
33	O
MHz	O
.	O
</s>
<s>
The	O
LC	B-Device
575	O
also	O
introduced	O
the	O
comm	B-Device
slot	I-Device
,	O
which	O
was	O
included	O
in	O
most	O
later	O
LC	B-Device
models	O
as	O
well	O
.	O
</s>
<s>
In	O
May	O
1994	O
,	O
a	O
set	O
of	O
Performa	B-Device
variants	O
were	O
introduced	O
:	O
the	O
Performa	B-Device
575	O
,	O
577	O
and	O
578	O
.	O
</s>
<s>
The	O
machines	O
are	O
identical	O
except	O
for	O
the	O
amount	O
of	O
RAM	B-Architecture
and	O
the	O
HDD	O
size	O
.	O
</s>
<s>
Software	O
packages	O
included	O
with	O
the	O
Performa	B-Device
variants	O
include	O
ClarisWorks	B-Device
2.0	I-Device
,	O
Quicken	B-Application
4.0	I-Application
,	O
Grolier	O
's	O
Encyclopedia	O
,	O
the	O
1993	O
Time	O
Magazine	O
Almanac	O
,	O
At	B-Operating_System
Ease	I-Operating_System
and	O
some	O
educational	O
titles	O
.	O
</s>
<s>
David	O
Pogue	O
described	O
this	O
machine	O
as	O
having	O
been	O
"	O
enthusiastically	O
received	O
by	O
Mac	B-Device
fans	O
,	O
who	O
appreciated	O
their	O
crisp	O
color	O
screens	O
,	O
speedy	O
performance	O
,	O
rich	O
sound	O
,	O
and	O
upgradability	O
to	O
Power	O
Macs	B-Device
down	O
the	O
line.	O
"	O
</s>
<s>
The	O
LC	B-Device
variant	O
was	O
succeeded	O
by	O
the	O
Macintosh	B-Device
LC	B-Device
580	O
on	O
the	O
lower	O
end	O
or	O
the	O
PowerPC-based	O
Power	B-Device
Macintosh	I-Device
5200	I-Device
LC	I-Device
models	O
at	O
the	O
higher	O
end	O
.	O
</s>
<s>
The	O
Performa	B-Device
variants	O
were	O
sold	O
until	O
the	O
580	O
was	O
discontinued	O
.	O
</s>
<s>
This	O
model	O
is	O
a	O
favorite	O
motherboard	O
donor	O
for	O
those	O
wishing	O
to	O
upgrade	O
the	O
Color	B-Device
Classic	I-Device
to	O
a	O
faster	O
class	O
of	O
processor	B-General_Concept
.	O
</s>
<s>
Apple	O
also	O
offered	O
an	O
upgrade	O
path	O
in	O
the	O
form	O
of	O
a	O
PowerPC	B-Architecture
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
.	O
</s>
<s>
Macintosh	B-Device
Performa	I-Device
575:5	O
MB	O
RAM	B-Architecture
,	O
250	O
MB	O
HDD	O
.	O
</s>
<s>
Macintosh	B-Device
Performa	I-Device
578	I-Device
:	O
the	O
Performa	B-Device
577	O
with	O
8	O
MB	O
of	O
RAM	B-Architecture
and	O
320	O
MB	O
HDD	O
.	O
</s>
<s>
Macintosh	B-Device
LC	B-Device
575	O
:	O
5	O
MB	O
RAM	B-Architecture
,	O
160	O
MB	O
HDD	O
,	O
CD-ROM	B-Device
.	O
</s>
<s>
An	O
additional	O
model	O
with	O
8	O
MB	O
RAM	B-Architecture
was	O
available	O
for	O
volume	O
purchase	O
.	O
</s>
<s>
The	O
Macintosh	B-Device
LC	B-Device
580	O
was	O
sold	O
from	O
April	O
1995	O
to	O
May	O
1996	O
.	O
</s>
<s>
Like	O
the	O
LC	B-Device
575	O
,	O
it	O
is	O
built	O
around	O
a	O
Motorola	O
68LC040	O
processor	B-General_Concept
,	O
running	O
at	O
33	O
MHz	O
.	O
</s>
<s>
However	O
,	O
instead	O
of	O
using	O
the	O
same	O
sized	O
,	O
SCSI-only	O
,	O
logic	O
boards	O
based	O
on	O
the	O
LC	B-Device
475/Quadra	O
605	O
like	O
the	O
LC	B-Device
575	O
,	O
the	O
580	O
uses	O
the	O
larger	O
logic	O
board	O
of	O
the	O
Performa	B-Device
630	I-Device
.	O
</s>
<s>
This	O
meant	O
a	O
few	O
changes	O
,	O
most	O
of	O
them	O
leading	O
to	O
lower	O
prices	O
,	O
but	O
also	O
lower	O
performance	O
:	O
Most	O
notably	O
,	O
the	O
hard	B-Device
drives	I-Device
of	O
the	O
580	O
were	O
IDE	B-Protocol
drives	I-Protocol
instead	O
of	O
SCSI	B-Architecture
drives	O
.	O
</s>
<s>
Also	O
,	O
the	O
video	O
RAM	B-Architecture
was	O
no	O
longer	O
mounted	O
on	O
a	O
SIMM	B-General_Concept
,	O
but	O
used	O
1	O
MB	O
of	O
the	O
4	O
MB	O
of	O
main	O
RAM	B-Architecture
soldered	O
to	O
the	O
motherboard	O
.	O
</s>
<s>
Lastly	O
,	O
the	O
Trinitron	O
display	O
of	O
the	O
575	O
was	O
replaced	O
with	O
a	O
cheaper	O
shadow	B-General_Concept
mask	I-General_Concept
screen	O
,	O
causing	O
a	O
slight	O
change	O
in	O
the	O
plastic	O
case	O
surrounding	O
the	O
CRT	B-Device
.	O
</s>
<s>
One	O
benefit	O
of	O
this	O
change	O
was	O
the	O
ability	O
to	O
accommodate	O
the	O
same	O
video	O
capture	O
and	O
TV	B-Device
tuner	I-Device
cards	I-Device
designed	O
for	O
the	O
Performa	B-Device
630	I-Device
.	O
</s>
<s>
This	O
allowed	O
LC	B-Device
580	O
users	O
to	O
watch	O
and	O
record	O
video	O
,	O
essentially	O
performing	O
the	O
function	O
of	O
a	O
television	O
as	O
well	O
as	O
a	O
computer	O
.	O
</s>
<s>
The	O
LC	B-Device
580	O
and	O
LC	B-Device
630	O
DOS	O
Compatible	O
,	O
which	O
were	O
introduced	O
at	O
the	O
same	O
time	O
,	O
were	O
last	O
the	O
Macintosh	B-Device
desktop	O
systems	O
to	O
be	O
built	O
around	O
a	O
Motorola	O
68000-series	O
processor	B-General_Concept
.	O
</s>
<s>
Its	O
replacement	O
,	O
the	O
Power	B-Device
Macintosh	I-Device
5200	I-Device
LC	I-Device
,	O
features	O
a	O
PowerPC	B-Architecture
processor	I-Architecture
.	O
</s>
<s>
Apple	O
also	O
offered	O
an	O
upgrade	O
path	O
for	O
the	O
580	O
in	O
the	O
form	O
of	O
a	O
PowerPC	B-Architecture
Macintosh	B-Device
Processor	I-Device
Upgrade	I-Device
.	O
</s>
<s>
The	O
580	O
can	O
also	O
be	O
upgraded	O
with	O
the	O
following	O
logic	O
boards	O
:	O
5200	B-Device
LC	I-Device
,	O
6200	B-Device
,	O
5260	B-Device
,	O
5300	B-Device
,	O
6300	O
,	O
5400	B-Device
,	O
6400	B-Device
,	O
5500	B-Device
and	O
6500	B-Device
.	O
</s>
<s>
The	O
LC	B-Device
580	O
's	O
Performa	B-Device
variants	O
were	O
only	O
available	O
outside	O
of	O
the	O
United	O
States	O
.	O
</s>
<s>
Macintosh	B-Device
LC	B-Device
580	O
:	O
8	O
MB	O
RAM	B-Architecture
,	O
500	O
MB	O
HDD	O
,	O
sold	O
only	O
in	O
the	O
education	O
market	O
.	O
</s>
<s>
Memory	B-Architecture
:	O
8	O
MB	O
,	O
expandable	O
to	O
52	O
MB	O
with	O
2	O
72-pin	O
SIMMs	B-General_Concept
.	O
</s>
<s>
1	O
MB	O
of	O
the	O
4	O
MB	O
RAM	B-Architecture
soldered	O
on	O
the	O
mainboard	O
is	O
used	O
as	O
video	O
RAM	B-Architecture
.	O
</s>
<s>
Storage	O
:	O
Hard	B-Device
drive	I-Device
is	O
250	O
MB	O
or	O
500	O
MB	O
IDE	B-Protocol
;	O
floppy	O
drive	O
is	O
a	O
1.44	O
MB	O
SuperDrive	B-Device
(	O
can	O
read	O
400	O
KB	O
and	O
800	O
KB	O
diskettes	O
as	O
well	O
)	O
;	O
CD-ROM	B-Device
is	O
a	O
4x	O
AppleCD	B-Device
unit	O
.	O
</s>
