<s>
The	O
3Com	O
3Server	B-Application
was	O
a	O
headless	O
dedicated	O
network-attached	B-Application
storage	I-Application
machine	O
designed	O
to	O
run	O
3Com	O
local	B-General_Concept
area	I-General_Concept
network	I-General_Concept
(	O
LAN	B-General_Concept
)	O
server	B-Application
software	I-Application
,	O
3+Share	B-General_Concept
.	O
</s>
<s>
The	O
companion	O
product	O
was	O
the	O
diskless	O
3Station	B-Device
network	O
workstation	O
,	O
a	O
dedicated	O
client	O
machine	O
.	O
</s>
<s>
However	O
,	O
3Servers	B-Application
could	O
also	O
network	O
with	O
standard	O
PC-compatibles	O
and	O
were	O
commonly	O
used	O
in	O
this	O
role	O
.	O
</s>
<s>
Having	O
no	O
display	O
other	O
than	O
a	O
small	O
one-line	O
LCD	B-Device
and	O
no	O
keyboard	O
or	O
mouse	O
interface	O
,	O
3Servers	B-Application
were	O
controlled	O
via	O
another	O
PC	O
on	O
the	O
network	O
which	O
allowed	O
console	O
access	O
to	O
the	O
internal	O
server	B-Application
software	I-Application
.	O
</s>
<s>
The	O
original	O
3Server	B-Application
was	O
a	O
x86	O
computer	O
that	O
was	O
n't	O
compatible	O
with	O
any	O
ordinary	O
PC	O
based	O
on	O
an	O
Intel	B-Device
80186	I-Device
CPU	O
,	O
running	O
a	O
special	O
version	O
of	O
MS-DOS	B-Application
and	O
3Com	O
's	O
proprietary	O
3+Share	B-General_Concept
network	B-Application
server	I-Application
software	O
.	O
</s>
<s>
This	O
was	O
a	O
multitasking	O
network	B-Application
server	I-Application
stack	O
that	O
ran	O
on	O
top	O
of	O
single-tasking	O
DOS	O
.	O
</s>
<s>
Internally	O
,	O
it	O
had	O
a	O
network	B-Protocol
stack	I-Protocol
,	O
file	O
and	O
print	O
server	O
modules	O
,	O
disk	O
caching	O
,	O
user	O
handling	O
and	O
more	O
,	O
all	O
running	O
simultaneously	O
inside	O
the	O
DOS	O
memory	O
space	O
.	O
</s>
<s>
Because	O
they	O
were	O
not	O
limited	O
by	O
the	O
PC	O
memory	O
map	O
,	O
3Servers	B-Application
could	O
support	O
1	O
megabyte	O
of	O
flat	O
memory	O
,	O
breaking	O
the	O
PC	O
's	O
640	O
kB	O
barrier	O
.	O
</s>
<s>
The	O
original	O
3Server	B-Application
shipped	O
in	O
1985	O
with	O
of	O
RAM	O
and	O
a	O
single	O
hard	O
disk	O
.	O
</s>
<s>
It	O
had	O
slots	O
for	O
adding	O
six	O
additional	O
drives	O
,	O
making	O
it	O
one	O
of	O
the	O
first	O
network	B-Application
attached	I-Application
storage	I-Application
(	O
NAS	B-Application
)	O
arrays	O
.	O
</s>
<s>
It	O
supported	O
both	O
Ethernet	O
(	O
then	O
branded	O
EtherSeries	O
)	O
and	O
AppleTalk	B-Application
and	O
was	O
quick	O
to	O
add	O
IBM	B-Device
Token	I-Device
Ring	I-Device
as	O
well	O
.	O
</s>
<s>
The	O
3Server/70	O
,	O
introduced	O
in	O
July	O
1985	O
,	O
doubled	O
the	O
storage	O
space	O
to	O
The	O
3Server/500	O
was	O
a	O
80386-based	O
version	O
introduced	O
in	O
the	O
late	O
1980s	O
,	O
with	O
the	O
80486-based	O
3Server/600	O
introduced	O
in	O
1991	O
.	O
</s>
<s>
The	O
last	O
models	O
,	O
the	O
3Server386	O
family	O
,	O
ran	O
OS/2	B-Application
1.3	O
as	O
the	O
basic	O
operating	O
system	O
,	O
using	O
3+Open	B-General_Concept
,	O
a	O
variant	O
of	O
OS/2	B-Algorithm
LAN	I-Algorithm
Manager	I-Algorithm
.	O
</s>
<s>
3Com	O
's	O
version	O
was	O
an	O
enhancement	O
of	O
the	O
basic	O
LAN	B-Algorithm
Manager	I-Algorithm
package	O
,	O
also	O
sold	O
by	O
Microsoft	O
and	O
IBM	O
and	O
on	O
other	O
operating	O
systems	O
-	O
for	O
example	O
,	O
running	O
on	O
VAX/VMS	B-Operating_System
it	O
was	O
the	O
basis	O
of	O
DEC	O
Pathworks	B-Application
.	O
</s>
<s>
In	O
February	O
,	O
1991	O
,	O
3Com	O
announced	O
that	O
it	O
would	O
hand	O
over	O
all	O
rights	O
to	O
LAN	B-Algorithm
Manager	I-Algorithm
,	O
3+Open	B-General_Concept
,	O
its	O
Macintosh	O
and	O
NetWare	O
integration	O
,	O
and	O
related	O
software	O
to	O
Microsoft	O
.	O
</s>
<s>
The	O
company	O
soon	O
exited	O
the	O
network	B-Application
server	I-Application
business	O
as	O
well	O
.	O
</s>
