<s>
Macintosh	B-Device
Centris	I-Device
is	O
a	O
family	O
of	O
personal	B-Device
computers	I-Device
designed	O
,	O
manufactured	O
and	O
sold	O
by	O
Apple	O
Computer	O
,	O
Inc	O
.	O
in	O
1992	O
and	O
1993	O
.	O
</s>
<s>
They	O
were	O
introduced	O
as	O
a	O
replacement	O
for	O
the	O
six-year-old	O
Macintosh	B-Device
II	I-Device
family	O
of	O
computers	O
;	O
the	O
name	O
was	O
chosen	O
to	O
indicate	O
that	O
the	O
consumer	O
was	O
selecting	O
a	O
Macintosh	O
in	O
the	O
center	O
of	O
Apple	O
's	O
product	O
line	O
.	O
</s>
<s>
Centris	O
machines	O
were	O
the	O
first	O
to	O
offer	O
Motorola	B-Device
68040	I-Device
CPUs	O
at	O
a	O
price	O
point	O
around	O
US$2	O
,	O
500	O
,	O
making	O
them	O
significantly	O
less	O
expensive	O
(	O
albeit	O
slower	O
)	O
than	O
Quadra	B-Device
computers	O
,	O
but	O
also	O
offering	O
higher	O
performance	O
than	O
the	O
Macintosh	B-Device
LC	I-Device
computers	O
of	O
the	O
time	O
.	O
</s>
<s>
Apple	O
released	O
three	O
computers	O
bearing	O
the	O
Centris	O
name	O
:	O
the	O
Centris	B-Device
610	I-Device
(	O
replacing	O
the	O
Macintosh	B-Device
IIsi	I-Device
)	O
and	O
Centris	B-Device
650	I-Device
(	O
replacing	O
the	O
Macintosh	B-Device
IIci	I-Device
in	O
form	O
and	O
the	O
Quadra	B-Device
700	I-Device
in	O
function	O
)	O
,	O
both	O
of	O
which	O
were	O
introduced	O
in	O
March	O
1993	O
,	O
and	O
the	O
Centris	B-Device
660AV	I-Device
which	O
followed	O
in	O
July	O
.	O
</s>
<s>
Apple	O
also	O
considered	O
the	O
Macintosh	B-Device
IIvx	I-Device
to	O
be	O
part	O
of	O
the	O
Centris	O
line	O
.	O
</s>
<s>
The	O
retirement	O
of	O
the	O
Centris	O
name	O
was	O
announced	O
in	O
September	O
1993	O
,	O
with	O
the	O
610	O
,	O
650	O
and	O
660AV	O
all	O
being	O
rebranded	O
the	O
following	O
month	O
as	O
Macintosh	B-Device
Quadra	I-Device
machines	O
as	O
part	O
of	O
Apple	O
's	O
effort	O
to	O
reposition	O
their	O
product	O
families	O
to	O
correlate	O
with	O
customer	O
markets	O
instead	O
of	O
price	O
ranges	O
and	O
features	O
.	O
</s>
<s>
The	O
IIvx	O
was	O
also	O
discontinued	O
in	O
favor	O
of	O
the	O
newly	O
announced	O
Quadra	B-Device
605	I-Device
.	O
</s>
<s>
The	O
Centris	B-Device
610	I-Device
uses	O
a	O
20MHz	O
68LC040	O
CPU	O
,	O
which	O
has	O
no	O
math	B-General_Concept
coprocessor	I-General_Concept
functions	O
.	O
</s>
<s>
It	O
used	O
a	O
new	O
"	O
pizza	O
box	O
"	O
case	O
that	O
was	O
intended	O
to	O
be	O
placed	O
under	O
the	O
user	O
's	O
computer	B-Device
monitor	I-Device
.	O
</s>
<s>
The	O
Centris	B-Device
610	I-Device
also	O
provided	O
the	O
basis	O
for	O
the	O
Workgroup	B-Device
Server	I-Device
60	I-Device
.	O
</s>
<s>
This	O
case	O
was	O
also	O
used	O
for	O
the	O
Power	B-Device
Macintosh	I-Device
6100	I-Device
lines	O
of	O
computers	O
and	O
,	O
when	O
these	O
later	O
computers	O
were	O
introduced	O
,	O
Apple	O
offered	O
consumers	O
a	O
product	O
upgrade	O
path	O
by	O
letting	O
them	O
buy	O
a	O
new	O
motherboard	O
.	O
</s>
<s>
The	O
base-configuration	O
Centris	B-Device
650	I-Device
uses	O
a	O
25MHz	O
68LC040	O
CPU	O
;	O
while	O
more	O
expensive	O
configurations	O
with	O
built-in	O
Ethernet	O
use	O
the	O
25MHz	O
68040	B-Device
allowing	O
it	O
to	O
succeed	O
the	O
Quadra	B-Device
700	I-Device
.	O
</s>
<s>
The	O
Centris	B-Device
660AV	I-Device
uses	O
a	O
25MHz	O
68040	B-Device
and	O
also	O
includes	O
an	O
AT&T	O
3210	O
digital	B-Architecture
signal	I-Architecture
processor	I-Architecture
.	O
</s>
<s>
It	O
uses	O
the	O
"	O
pizza	O
box	O
"	O
case	O
which	O
debuted	O
earlier	O
in	O
the	O
Centris	B-Device
610	I-Device
.	O
</s>
<s>
The	O
Centris	B-Device
610	I-Device
and	O
650	O
were	O
replaced	O
about	O
six	O
months	O
after	O
their	O
introduction	O
by	O
the	O
Quadra	B-Device
610	I-Device
and	O
650	O
models	O
,	O
which	O
kept	O
the	O
same	O
case	O
and	O
designs	O
but	O
raised	O
the	O
CPU	O
speeds	O
from	O
20MHz	O
and	O
25MHz	O
to	O
25MHz	O
and	O
33MHz	O
,	O
respectively	O
–	O
while	O
the	O
Centris	B-Device
660AV	I-Device
was	O
renamed	O
as	O
the	O
Quadra	B-Device
660AV	I-Device
without	O
any	O
actual	O
design	O
change	O
.	O
</s>
<s>
Some	O
later	O
Centris	B-Device
660AV	I-Device
Macs	O
have	O
manual-inject	O
floppy	O
drives	O
,	O
so	O
this	O
change	O
was	O
not	O
entirely	O
concurrent	O
with	O
the	O
name	O
change	O
.	O
</s>
