<s>
The	O
IBM	B-Device
ThinkPad	I-Device
600	I-Device
series	I-Device
are	O
a	O
series	O
of	O
notebook	B-Device
computers	I-Device
introduced	O
in	O
1998	O
by	O
IBM	O
as	O
the	O
immediate	O
predecessor	O
to	O
the	O
T-series	O
which	O
still	O
exists	O
today	O
under	O
Lenovo	O
ownership	O
.	O
</s>
<s>
Three	O
models	O
were	O
produced	O
,	O
the	O
600	O
,	O
600E	O
,	O
and	O
600X	O
;	O
the	O
series	O
was	O
succeeded	O
in	O
2000	O
by	O
the	O
ThinkPad	B-Device
T20	I-Device
series	I-Device
.	O
</s>
<s>
The	O
600	O
series	O
was	O
designed	O
to	O
be	O
a	O
more	O
portable	O
version	O
of	O
the	O
770	B-Device
series	O
,	O
featuring	O
slimmer	O
dimensions	O
and	O
a	O
weight	O
of	O
around	O
5	O
pounds	O
(	O
2.3kg	O
)	O
,	O
by	O
using	O
lightweight	O
but	O
strong	O
carbon	O
fiber	O
composite	O
plastics	O
.	O
</s>
<s>
The	O
600	O
series	O
also	O
introduced	O
the	O
new	O
UltraSlimBay	B-Architecture
(	O
not	O
to	O
be	O
confused	O
with	O
the	O
UltraBay	B-Architecture
Slim	O
as	O
found	O
on	O
the	O
later	O
T40/T60	O
series	O
)	O
,	O
as	O
well	O
as	O
easily	O
interchangeable	O
RAM	O
and	O
hard	O
drives	O
;	O
all	O
600	O
series	O
machines	O
shipped	O
with	O
32	O
or	O
64	O
MB	O
of	O
RAM	O
integrated	O
on	O
the	O
motherboard	O
from	O
the	O
factory	O
.	O
</s>
<s>
The	O
600	O
series	O
originally	O
shipped	O
with	O
either	O
Windows	B-Application
95	I-Application
or	O
Windows	B-Device
NT	I-Device
4.0	I-Device
,	O
with	O
later	O
models	O
shipping	O
with	O
Windows	B-Device
98	I-Device
or	O
Windows	B-Application
2000	I-Application
;	O
all	O
600	O
models	O
could	O
also	O
run	O
Windows	O
3.x	O
,	O
OS/2	O
Warp	O
4	O
,	O
Windows	B-Device
Me	I-Device
,	O
or	O
Windows	B-Application
XP	I-Application
as	O
well	O
as	O
various	O
Linux	O
distributions	O
.	O
</s>
<s>
None	O
of	O
the	O
600	O
series	O
models	O
included	O
wireless	O
adapters	O
or	O
Ethernet	O
ports	O
as	O
an	O
option	O
,	O
but	O
these	O
could	O
be	O
added	O
through	O
a	O
third-party	O
PCMCIA/CardBus	O
card	O
.	O
</s>
<s>
ThinkPad	B-Device
600	I-Device
-	O
First	O
model	O
shipped	O
,	O
featured	O
either	O
a	O
Pentium	O
MMX	B-Architecture
at	O
233MHz	O
or	O
a	O
Pentium	B-General_Concept
II	I-General_Concept
at	O
233	O
,	O
266	O
or	O
300	O
MHz	O
.	O
</s>
<s>
ThinkPad	B-Device
600E	I-Device
-	O
Featuring	O
a	O
Pentium	B-General_Concept
II	I-General_Concept
processor	O
at	O
either	O
300MHz	O
,	O
366MHz	O
,	O
or	O
400MHz	O
,	O
all	O
models	O
of	O
the	O
600E	O
featured	O
at	O
13.3	O
"	O
XGA	O
TFT	O
display	O
as	O
standard	O
.	O
</s>
<s>
ThinkPad	B-Device
600X	I-Device
-	O
The	O
final	O
model	O
of	O
the	O
600	O
series	O
,	O
featuring	O
a	O
Pentium	B-General_Concept
III	I-General_Concept
at	O
either	O
450MHz	O
,	O
500MHz	O
,	O
or	O
650MHz	O
(	O
with	O
SpeedStep	B-Device
technology	O
)	O
and	O
a	O
13.3	O
"	O
XGA	O
TFT	O
display	O
as	O
standard	O
.	O
</s>
