<s>
The	O
M-series	O
of	O
desktops	B-Device
are	O
part	O
of	O
Lenovo	O
's	O
ThinkCentre	B-Device
product	O
line	O
.	O
</s>
<s>
Formerly	O
an	O
IBM	O
brand	O
,	O
Lenovo	O
acquired	O
the	O
ThinkCentre	B-Device
desktop	O
brand	O
following	O
its	O
purchase	O
of	O
IBM	O
's	O
Personal	O
Computing	O
Division	O
(	O
PCD	O
)	O
in	O
2005	O
.	O
</s>
<s>
Following	O
its	O
acquisition	O
of	O
IBM	O
's	O
PCD	O
,	O
Lenovo	O
has	O
released	O
M-series	O
desktops	B-Device
in	O
multiple	O
form	O
factors	O
,	O
ranging	O
from	O
traditional	O
tower	O
,	O
to	O
small	B-Device
form	I-Device
factor	I-Device
,	O
and	O
all-in-ones	O
(	O
AIOs	O
)	O
.	O
</s>
<s>
In	O
2003	O
,	O
IBM	O
redesigned	O
and	O
re-launched	O
their	O
ThinkCentre	B-Device
product	O
line	O
.	O
</s>
<s>
The	O
first	O
desktop	O
in	O
IBM	O
's	O
redesigned	O
ThinkCentre	B-Device
line	O
was	O
the	O
M50	O
,	O
announced	O
in	O
2003	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
desktop	O
released	O
by	O
Lenovo	O
in	O
2005	O
,	O
following	O
its	O
acquisition	O
of	O
IBM	O
's	O
PCD	O
was	O
the	O
M52	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M52	O
desktop	O
was	O
announced	O
in	O
May	O
2005	O
following	O
Lenovo	O
's	O
acquisition	O
of	O
IBM	O
's	O
Personal	O
Computing	O
Division	O
.	O
</s>
<s>
The	O
M52	O
desktop	O
was	O
equipped	O
with	O
a	O
3GHz	O
Pentium	O
4	O
processors	O
,	O
an	O
80	O
GB	O
hard	O
disk	O
drive	O
,	O
up	O
to	O
4	O
GB	O
of	O
RAM	O
,	O
eight	O
USB	B-Protocol
2.0	O
ports	O
,	O
two	O
serial	O
ports	O
,	O
a	O
Gigabit	O
Ethernet	O
connection	O
,	O
VGA	O
output	O
,	O
and	O
a	O
chassis	O
that	O
did	O
not	O
require	O
tools	O
to	O
open	O
−	O
a	O
toolless	O
chassis	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M55	O
,	O
M55p	O
,	O
and	O
M55e	O
were	O
announced	O
by	O
Lenovo	O
in	O
September	O
2006	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M55	O
received	O
a	O
positive	O
review	O
from	O
PC	O
World	O
,	O
with	O
the	O
reviewer	O
stating	O
that	O
"	O
The	O
Lenovo	B-Device
ThinkCentre	I-Device
M55	O
9BM	O
is	O
a	O
compact	O
and	O
quiet	O
business	O
PC	O
that	O
keeps	O
maintenance	O
simple	O
and	O
makes	O
upgrades	O
easy	O
.	O
</s>
<s>
Despite	O
the	O
fact	O
that	O
the	O
desktop	O
was	O
capable	O
of	O
handling	O
Windows	B-Application
Vista	I-Application
Business	O
,	O
it	O
was	O
preloaded	O
with	O
Windows	O
XP	O
.	O
</s>
<s>
While	O
the	O
chassis	O
was	O
similar	O
to	O
previous	O
ThinkCentre	B-Device
desktops	B-Device
,	O
it	O
was	O
made	O
smaller	O
to	O
fit	O
better	O
in	O
office	O
spaces	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M55p	O
desktop	O
offered	O
the	O
following	O
specifications	O
:	O
</s>
<s>
The	O
ThinkCentre	B-Device
M55e	O
desktop	O
was	O
equipped	O
with	O
:	O
</s>
<s>
PCMag	O
listed	O
the	O
pros	O
as	O
being	O
the	O
dual	O
core	O
processor	O
,	O
small	B-Device
form	I-Device
factor	I-Device
,	O
enterprise-class	O
hardware	O
,	O
ThinkVantage	O
Technologies	O
,	O
and	O
the	O
three	O
year	O
on-site	O
warranty	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M-series	O
desktops	B-Device
released	O
by	O
Lenovo	O
in	O
2007	O
were	O
the	O
M57	O
and	O
M57p	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M57	O
and	O
M57p	O
desktops	B-Device
were	O
announced	O
in	O
September	O
2007	O
by	O
Lenovo	O
.	O
</s>
<s>
These	O
were	O
the	O
first	O
desktops	B-Device
from	O
a	O
manufacturer	O
to	O
receive	O
a	O
GREENGUARD	O
certification	O
.	O
</s>
<s>
In	O
addition	O
,	O
both	O
desktops	B-Device
were	O
EPEAT	O
Gold	O
and	O
Energy	O
Star	O
4.0	O
rated	O
.	O
</s>
<s>
They	O
were	O
also	O
the	O
first	O
ThinkCentre	B-Device
desktops	B-Device
to	O
incorporate	O
recycled	O
material	O
from	O
consumer	O
plastics	O
.	O
</s>
<s>
The	O
desktops	B-Device
were	O
equipped	O
with	O
up	O
to	O
Intel	O
Core	O
2	O
Duo	O
processors	O
,	O
up	O
to	O
2	O
GB	O
DDR2	O
RAM	O
,	O
integrated	O
graphics	O
,	O
and	O
up	O
to	O
160GB	O
hard	O
disk	O
drive	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M57	O
Eco	O
and	O
M57p	O
Eco	O
were	O
announced	O
by	O
Lenovo	O
in	O
March	O
2008	O
.	O
</s>
<s>
The	O
desktops	B-Device
were	O
dubbed	O
"	O
eco	O
"	O
and	O
had	O
an	O
ultra-small	O
form	O
factor	O
with	O
low	O
power	O
consumption	O
.	O
</s>
<s>
According	O
to	O
Desktop	O
Review	O
,	O
the	O
M57	O
used	O
a	O
fraction	O
of	O
the	O
power	O
needed	O
by	O
standard	O
desktops	B-Device
,	O
and	O
a	O
little	O
more	O
than	O
that	O
of	O
an	O
energy-saving	O
notebook	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M-series	O
desktop	O
released	O
by	O
Lenovo	O
in	O
2009	O
was	O
the	O
M58e	O
.	O
</s>
<s>
The	O
Small	B-Device
Form	I-Device
Factor	I-Device
version	O
uses	O
a	O
BTX	O
motherboard	O
.	O
</s>
<s>
Lenovo	O
announced	O
the	O
ThinkCentre	B-Device
M58e	O
desktop	O
in	O
March	O
2009	O
.	O
</s>
<s>
PC	O
Mag	O
summarized	O
its	O
review	O
of	O
the	O
desktop	O
by	O
saying	O
"	O
The	O
Lenovo	B-Device
ThinkCentre	I-Device
M58e	O
is	O
a	O
middle-of-the-road	O
business	O
PC	O
,	O
both	O
in	O
performance	O
and	O
features	O
,	O
though	O
it	O
does	O
have	O
the	O
added	O
benefits	O
of	O
Intel	B-Architecture
vPro	I-Architecture
and	O
IT-friendly	O
features	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M-series	O
desktops	B-Device
released	O
by	O
Lenovo	O
in	O
2010	O
were	O
the	O
M70e	O
,	O
M70z	O
,	O
M90	O
,	O
and	O
M90z	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M71e	O
desktop	O
was	O
described	O
by	O
PCWorld	O
as	O
being	O
"	O
a	O
basic	O
PC	O
designed	O
for	O
small	O
and	O
medium-sized	O
businesses	O
"	O
.	O
</s>
<s>
The	O
desktop	O
was	O
,	O
overall	O
,	O
described	O
as	O
being	O
a	O
simple	O
machine	O
with	O
a	O
decent	O
configuration	O
,	O
without	O
"	O
fancy	O
features	O
"	O
such	O
as	O
a	O
USB	B-Protocol
3.0	O
port	O
.	O
</s>
<s>
Other	O
features	O
on	O
the	O
desktop	O
included	O
four	O
USB	B-Protocol
2.0	O
ports	O
,	O
a	O
Gigabit	O
Ethernet	O
port	O
,	O
DVI	O
,	O
Display	O
Port	O
,	O
and	O
analogue	O
audio	O
ports	O
.	O
</s>
<s>
The	O
ThinkCentre	B-Device
M75e	O
desktop	O
was	O
praised	O
by	O
SlashGear	O
for	O
its	O
processing	O
power	O
and	O
small	B-Device
form	I-Device
factor	I-Device
.	O
</s>
<s>
In	O
terms	O
of	O
design	O
,	O
the	O
desktop	O
was	O
similar	O
to	O
other	O
ThinkCentre	B-Device
products	O
from	O
Lenovo	O
,	O
with	O
no	O
unnecessary	O
styling	O
and	O
designs	O
.	O
</s>
<s>
The	O
primary	O
points	O
of	O
criticism	O
were	O
a	O
direct	O
result	O
of	O
the	O
desktop	O
's	O
small	B-Device
form	I-Device
factor	I-Device
.	O
</s>
<s>
The	O
PC	O
's	O
fan	O
would	O
only	O
run	O
for	O
a	O
short	O
duration	O
at	O
a	O
high	O
speed	O
,	O
making	O
it	O
louder	O
than	O
some	O
desktops	B-Device
and	O
workstations	O
.	O
</s>
<s>
Detailed	O
specifications	O
of	O
the	O
ThinkCentre	B-Device
M75e	O
desktop	O
are	O
as	O
follows	O
:	O
</s>
<s>
Announced	O
on	O
October	O
28	O
,	O
2011	O
,	O
the	O
ThinkCentre	B-Device
M77	O
could	O
be	O
upgraded	O
to	O
include	O
AMD	O
's	O
FX	O
processors	O
and	O
up	O
to	O
16GB	O
of	O
RAM	O
.	O
</s>
<s>
According	O
to	O
Tom	O
Shell	O
,	O
the	O
vice-president	O
and	O
general	O
manager	O
of	O
Lenovo	O
's	O
Commercial	O
Desktop	O
Business	O
Unit	O
,	O
this	O
represented	O
a	O
level	O
of	O
processing	O
power	O
previously	O
found	O
only	O
in	O
premium	O
desktops	B-Device
.	O
</s>
<s>
The	O
desktop	O
was	O
made	O
available	O
in	O
both	O
tower	O
and	O
small	B-Device
form	I-Device
factors	I-Device
.	O
</s>
<s>
Additional	O
features	O
on	O
the	O
desktop	O
included	O
a	O
hard	O
disk	O
drive	O
of	O
up	O
to	O
1	O
TB	O
,	O
eight	O
USB	B-Protocol
2.0	O
ports	O
,	O
a	O
25-in-1	O
memory	O
card	O
reader	O
,	O
Trusted	O
Platform	O
Module	O
,	O
and	O
hard	O
disk	O
encryption	O
.	O
</s>
<s>
The	O
M92p	O
is	O
a	O
desktop	B-Device
computer	I-Device
designed	O
for	O
business	O
use	O
.	O
</s>
<s>
Like	O
other	O
computers	O
of	O
the	O
M	O
series	O
,	O
it	O
exists	O
in	O
three	O
form	O
factors	O
:	O
tower	O
,	O
small	B-Device
form	I-Device
factor	I-Device
(	O
SFF	O
)	O
and	O
tiny	O
.	O
</s>
<s>
The	O
M92p	O
is	O
available	O
with	O
both	O
hard	O
drives	O
and	O
solid-state	B-Device
storage	I-Device
.	O
</s>
<s>
One	O
difference	O
with	O
the	O
M91p	O
is	O
that	O
the	O
M92p	O
comes	O
with	O
four	O
USB	B-Protocol
3.0	O
ports	O
on	O
the	O
rear	O
of	O
the	O
computer	O
,	O
whilst	O
the	O
M91p	O
only	O
offers	O
USB	B-Protocol
2.0	O
ports	O
.	O
</s>
<s>
In	O
a	O
review	O
for	O
ZDNet	O
,	O
Charles	O
McLellan	O
wrote	O
,	O
"	O
Unless	O
internal	O
expansion	O
is	O
required	O
,	O
we	O
can	O
find	O
little	O
wrong	O
with	O
Lenovo	O
's	O
ThinkCentre	B-Device
M92p	O
as	O
a	O
business-class	O
small-form-factor	O
PC	O
(	O
and	O
there	O
are	O
bigger	O
models	O
in	O
the	O
range	O
if	O
expansion	O
is	O
required	O
)	O
.	O
</s>
<s>
The	O
M93/M93p	O
available	O
in	O
Tower	O
Form	O
Factor	O
,	O
Small	B-Device
Form	I-Device
Factor	I-Device
(	O
SFF	O
)	O
,	O
and	O
Tiny	O
Form	O
Factor	O
.	O
</s>
<s>
The	O
M83	O
is	O
available	O
in	O
Mini	O
Tower	O
Form	O
Factor	O
,	O
Small	B-Device
Form	I-Device
Factor	I-Device
,	O
or	O
Tiny	O
Form	O
Factor	O
.	O
</s>
<s>
The	O
M900	O
series	O
is	O
available	O
in	O
Tower	O
Form	O
Factor	O
,	O
Small	B-Device
Form	I-Device
Factor	I-Device
,	O
or	O
Tiny	O
Form	O
Factor	O
.	O
</s>
<s>
The	O
M700	O
series	O
is	O
available	O
in	O
Tower	O
Form	O
Factor	O
,	O
Small	B-Device
Form	I-Device
Factor	I-Device
,	O
Tiny	O
Form	O
Factor	O
,	O
or	O
Thin	O
Client	O
.	O
</s>
