<s>
MHSnet	B-Protocol
is	O
a	O
store-and-forward	B-Protocol
Message	O
Handling	O
System	O
for	O
wide	O
area	O
networks	O
.	O
</s>
<s>
MHSnet	B-Protocol
and	O
its	O
precursor	O
,	O
SUN3	O
,	O
were	O
used	O
to	O
implement	O
the	O
Australian	O
Computer	O
Science	O
network	O
,	O
commonly	O
known	O
as	O
ACSnet	B-Protocol
,	O
which	O
connected	O
Australia	O
's	O
Universities	O
to	O
each	O
other	O
and	O
to	O
ARPANET	O
.	O
</s>
<s>
MHSnet	B-Protocol
was	O
originally	O
developed	O
at	O
the	O
University	O
of	O
Sydney	O
by	O
Piers	O
Lauder	O
and	O
Bob	O
Kummerfeld	O
and	O
was	O
originally	O
known	O
as	O
SUN3	O
(	O
Sydney	O
University	O
Network	O
version	O
3	O
)	O
.	O
</s>
<s>
Technically	O
,	O
it	O
is	O
similar	O
in	O
concept	O
to	O
UUCP	B-Protocol
in	O
that	O
it	O
enabled	O
the	O
transfer	O
of	O
email	O
,	O
Usenet	B-Application
,	O
and	O
files	O
in	O
an	O
efficient	O
manner	O
over	O
non-dedicated	O
links	O
.	O
</s>
<s>
MHSnet	B-Protocol
was	O
a	O
key	O
technology	O
in	O
the	O
introduction	O
of	O
Internet	O
access	O
in	O
Australia	O
.	O
</s>
<s>
Due	O
to	O
the	O
prohibitive	O
costs	O
of	O
telecommunications	O
structure	O
,	O
and	O
the	O
small	O
amount	O
of	O
bandwidth	O
available	O
both	O
internally	O
and	O
to	O
other	O
countries	O
,	O
MHSnet	B-Protocol
provided	O
a	O
system	O
that	O
could	O
more	O
efficiently	O
use	O
network	O
resources	O
.	O
</s>
<s>
Gateways	O
between	O
ACSnet	B-Protocol
and	O
the	O
Internet	O
were	O
provided	O
by	O
many	O
universities	O
,	O
and	O
access	O
to	O
non-academic	O
users	O
was	O
granted	O
in	O
the	O
early	O
1990s	O
.	O
</s>
<s>
In	O
1989	O
,	O
with	O
the	O
introduction	O
of	O
AARnet	O
which	O
directly	O
connected	O
Australia	O
's	O
Universities	O
to	O
the	O
Internet	O
,	O
the	O
ACSnet	B-Protocol
and	O
MHSnet	B-Protocol
became	O
obsolete	O
.	O
</s>
<s>
ACSnet	B-Protocol
connected	O
hosts	O
in	O
Australia	O
resided	O
in	O
a	O
.oz	B-Protocol
domain	O
,	O
which	O
was	O
moved	O
into	O
the	O
Internet	O
's	O
.au	O
namespace	O
as	O
.oz.au	B-Protocol
.	O
</s>
