<s>
MS-Net	B-Application
,	O
sometimes	O
stylized	O
as	O
MS-NET	B-Application
,	O
was	O
an	O
early	O
network	B-Protocol
operating	I-Protocol
system	I-Protocol
sold	O
by	O
Microsoft	O
during	O
the	O
earliest	O
days	O
of	O
local	B-General_Concept
area	I-General_Concept
networking	I-General_Concept
(	O
LANs	B-General_Concept
)	O
.	O
</s>
<s>
MS-Net	B-Application
was	O
not	O
a	O
complete	O
networking	O
system	O
of	O
its	O
own	O
;	O
Microsoft	O
licensed	O
it	O
to	O
vendors	O
who	O
used	O
it	O
as	O
the	O
basis	O
for	O
server	O
programs	O
that	O
ran	O
on	O
MS-DOS	B-Application
,	O
porting	O
it	O
to	O
their	O
own	O
underlying	O
networking	O
hardware	O
and	O
adding	O
services	O
on	O
top	O
.	O
</s>
<s>
Version	O
1.0	O
was	O
announced	O
on	O
14	O
August	O
1984	O
and	O
released	O
along	O
with	O
the	O
PC/AT	B-Operating_System
on	O
2	O
April	O
1985	O
.	O
</s>
<s>
A	O
number	O
of	O
MS-Net	B-Application
products	O
were	O
sold	O
during	O
the	O
late	O
1980s	O
,	O
before	O
it	O
was	O
replaced	O
by	O
LAN	B-Algorithm
Manager	I-Algorithm
in	O
1990	O
.	O
</s>
<s>
MS-Net	B-Application
'	O
s	O
network	O
interface	O
was	O
based	O
on	O
IBM	O
's	O
NetBIOS	B-Protocol
protocol	O
definition	O
,	O
which	O
allowed	O
it	O
to	O
be	O
ported	O
to	O
different	O
networking	O
systems	O
with	O
relative	O
ease	O
.	O
</s>
<s>
It	O
did	O
not	O
implement	O
the	O
entire	O
NetBIOS	B-Protocol
protocol	O
,	O
however	O
,	O
only	O
the	O
small	O
number	O
of	O
features	O
required	O
for	O
the	O
server	O
role	O
.	O
</s>
<s>
One	O
key	O
feature	O
that	O
was	O
not	O
implemented	O
was	O
NetBIOS	B-Protocol
's	O
name	O
management	O
routines	O
,	O
a	O
feature	O
3rd	O
parties	O
often	O
added	O
back	O
in	O
.	O
</s>
<s>
The	O
system	O
also	O
supplied	O
the	O
program	O
REDIR.EXE	O
,	O
which	O
allowed	O
transparent	O
file	O
access	O
from	O
DOS	B-Device
machines	O
to	O
any	O
MS-Net	B-Application
based	O
server	O
.	O
</s>
<s>
Several	O
products	O
from	O
the	O
mid-to-late-1980s	O
were	O
based	O
on	O
the	O
MS-Net	B-Application
system	O
.	O
</s>
<s>
IBM	O
's	O
PC-Net	O
was	O
a	O
slightly	O
modified	O
version	O
of	O
the	O
MS-Net	B-Application
system	O
typically	O
used	O
with	O
Token	B-Device
Ring	I-Device
.	O
</s>
<s>
MS	O
partnered	O
with	O
3Com	O
to	O
produce	O
the	O
more	O
widely	O
used	O
3+Share	B-General_Concept
system	O
running	O
on	O
a	O
3Com	O
networking	O
stack	O
based	O
on	O
the	O
XNS	B-Protocol
protocol	I-Protocol
on	O
Ethernet	O
.	O
</s>
<s>
Other	O
well-known	O
systems	O
,	O
including	O
Banyan	B-Operating_System
VINES	I-Operating_System
and	O
Novell	B-Operating_System
NetWare	I-Operating_System
,	O
did	O
not	O
use	O
MS-Net	B-Application
as	O
their	O
basis	O
,	O
using	O
Unix	B-Application
and	O
a	O
custom	O
OS	O
,	O
respectively	O
.	O
</s>
<s>
MS-Net	B-Application
was	O
sold	O
only	O
for	O
a	O
short	O
period	O
of	O
time	O
.	O
</s>
<s>
MS	O
and	O
3Com	O
collaborated	O
on	O
a	O
replacement	O
known	O
as	O
LAN	B-Algorithm
Manager	I-Algorithm
running	O
on	O
OS/2	B-Application
,	O
using	O
the	O
new	O
Server	B-Operating_System
Message	I-Operating_System
Block	I-Operating_System
standard	O
for	O
file	O
transfer	O
.	O
</s>
<s>
MS	O
's	O
version	O
remained	O
based	O
on	O
NetBIOS	B-Protocol
and	O
supported	O
a	O
number	O
of	O
underlying	O
protocols	O
and	O
hardware	O
.	O
</s>
<s>
LAN	B-Algorithm
Manager	I-Algorithm
was	O
itself	O
replaced	O
in	O
1993	O
by	O
Windows	B-Device
NT	I-Device
3.1	I-Device
.	O
</s>
