<s>
Multi-User	B-Application
Dungeon	I-Application
,	O
or	O
MUD	B-Application
(	O
referred	O
to	O
as	O
MUD1	B-Protocol
,	O
to	O
distinguish	O
it	O
from	O
its	O
successor	O
,	O
MUD2	B-Protocol
,	O
and	O
the	O
MUD	B-Application
genre	O
in	O
general	O
)	O
,	O
is	O
the	O
first	O
MUD	B-Application
.	O
</s>
<s>
MUD	B-Application
was	O
created	O
in	O
1978	O
by	O
Roy	B-Protocol
Trubshaw	I-Protocol
and	O
Richard	O
Bartle	O
at	O
the	O
University	O
of	O
Essex	O
on	O
a	O
DEC	B-Device
PDP-10	I-Device
.	O
</s>
<s>
Trubshaw	O
named	O
the	O
game	O
Multi-User	B-Application
Dungeon	I-Application
,	O
in	O
tribute	O
to	O
the	O
Dungeon	O
variant	O
of	O
Zork	B-Application
,	O
which	O
Trubshaw	O
had	O
greatly	O
enjoyed	O
playing	O
.	O
</s>
<s>
Zork	B-Application
in	O
turn	O
was	O
inspired	O
by	O
an	O
older	O
text-adventure	O
game	O
known	O
as	O
Colossal	B-Application
Cave	I-Application
Adventure	I-Application
or	O
ADVENT	B-Application
.	O
</s>
<s>
MUD1	B-Protocol
was	O
written	O
in	O
the	O
domain-specific	B-Language
programming	I-Language
language	I-Language
Multi	B-Application
User	I-Application
Dungeon	I-Application
Definition	O
Language	O
(	O
MUDDL	B-Protocol
)	O
.	O
</s>
<s>
Its	O
first	O
version	O
was	O
written	O
by	O
Richard	O
Bartle	O
and	O
Roy	B-Protocol
Trubshaw	I-Protocol
in	O
BCPL	B-Language
.	O
</s>
<s>
It	O
was	O
later	O
ported	O
to	O
C++	B-Language
and	O
used	O
in	O
other	O
MUDs	B-Application
such	O
as	O
MIST	O
.	O
</s>
<s>
In	O
1980	O
,	O
Roy	B-Protocol
Trubshaw	I-Protocol
created	O
MUD	B-Application
version	O
3	O
in	O
BCPL	B-Language
(	O
the	O
predecessor	O
of	O
C	B-Language
)	O
,	O
to	O
conserve	O
memory	O
and	O
make	O
the	O
program	O
easier	O
to	O
maintain	O
.	O
</s>
<s>
Later	O
that	O
year	O
Roy	B-Protocol
Trubshaw	I-Protocol
graduated	O
from	O
Essex	O
University	O
,	O
handing	O
over	O
MUD	B-Application
to	O
Richard	O
Bartle	O
,	O
who	O
continued	O
developing	O
the	O
game	O
.	O
</s>
<s>
That	O
same	O
year	O
,	O
MUD1	B-Protocol
became	O
the	O
first	O
Internet	O
multiplayer	O
online	O
role-playing	O
game	O
as	O
Essex	O
University	O
connected	O
its	O
internal	O
network	O
to	O
the	O
ARPANET	O
.	O
</s>
<s>
In	O
1983	O
,	O
Essex	O
University	O
allowed	O
remote	O
access	O
to	O
its	O
DEC-10	B-Device
via	O
British	O
Telecom	O
's	O
Packet	B-Protocol
Switch	I-Protocol
Stream	I-Protocol
network	O
between	O
2	O
am	O
and	O
7	O
am	O
each	O
night	O
.	O
</s>
<s>
MUD	B-Application
became	O
popular	O
with	O
players	O
around	O
the	O
world	O
,	O
and	O
several	O
magazines	O
wrote	O
articles	O
on	O
this	O
new	O
trend	O
.	O
</s>
<s>
Between	O
1984	O
and	O
1987	O
,	O
MUD	B-Application
was	O
hosted	O
on	O
the	O
DEC-20	O
of	O
Dundee	O
College	O
of	O
Technology	O
which	O
was	O
one	O
of	O
the	O
few	O
institutions	O
to	O
allow	O
outside	O
access	O
.	O
</s>
<s>
In	O
1984	O
,	O
Compunet	O
,	O
a	O
UK-based	O
network	O
primarily	O
for	O
Commodore	O
64	O
users	O
,	O
licensed	O
MUD1	B-Protocol
and	O
ran	O
it	O
from	O
late	O
1984	O
until	O
1987	O
,	O
when	O
CompuNet	O
abandoned	O
the	O
DEC-10	B-Device
platform	O
they	O
were	O
using	O
.	O
</s>
<s>
Trubshaw	O
and	O
Bartle	O
worked	O
together	O
at	O
Multi-User	O
Entertainment	O
to	O
create	O
MUD2	B-Protocol
the	O
second	O
generation	O
of	O
MUD	B-Application
.	O
</s>
<s>
In	O
1985	O
,	O
Richard	O
Bartle	O
created	O
MUD1	B-Protocol
version	O
4	O
,	O
better	O
known	O
as	O
MUD2	B-Protocol
.	O
</s>
<s>
In	O
1987	O
,	O
MUD1	B-Protocol
was	O
licensed	O
by	O
CompuServe	O
,	O
who	O
pressured	O
Richard	O
Bartle	O
to	O
close	O
down	O
the	O
instance	O
of	O
MUD1	B-Protocol
,	O
better	O
known	O
as	O
'	O
Essex	B-Protocol
MUD	I-Protocol
 '	O
,	O
that	O
was	O
still	O
running	O
at	O
Essex	O
University	O
.	O
</s>
<s>
This	O
resulted	O
in	O
the	O
deletion	O
of	O
the	O
MUD	B-Application
account	O
in	O
October	O
1987	O
.	O
</s>
<s>
This	O
left	O
MIST	O
,	O
a	O
derivative	O
of	O
MUD1	B-Protocol
with	O
similar	O
gameplay	O
,	O
as	O
the	O
only	O
remaining	O
MUD	B-Application
running	O
on	O
the	O
Essex	O
University	O
network	O
,	O
becoming	O
one	O
of	O
the	O
first	O
of	O
its	O
kind	O
to	O
attain	O
broad	O
popularity	O
.	O
</s>
<s>
MIST	O
ran	O
until	O
the	O
machine	O
that	O
hosted	O
it	O
,	O
a	O
PDP-10	B-Device
,	O
was	O
superseded	O
in	O
early	O
1991	O
.	O
</s>
<s>
MUD1	B-Protocol
ran	O
under	O
the	O
name	O
British	B-Protocol
Legends	I-Protocol
until	O
late	O
1999	O
and	O
was	O
retired	O
along	O
with	O
other	O
software	O
during	O
CompuServe	O
's	O
Y2K	B-Error_Name
cleanup	O
efforts	O
.	O
</s>
<s>
In	O
2000	O
,	O
Viktor	O
Toth	O
rewrote	O
the	O
BCPL	B-Language
source	O
code	O
for	O
MUD1	B-Protocol
to	O
C++	B-Language
and	O
opened	O
it	O
alongside	O
MUD2	B-Protocol
on	O
British-legends.com	O
.	O
</s>
<s>
In	O
2014	O
,	O
Stanford	O
University	O
secured	O
permission	O
to	O
redistribute	O
the	O
game	O
's	O
blueprints	O
from	O
the	O
authors	O
of	O
MUD1	B-Protocol
.	O
</s>
<s>
Computer	O
Gaming	O
World	O
in	O
1993	O
called	O
British	B-Protocol
Legends	I-Protocol
on	O
CompuServe	O
"	O
your	O
typical	O
text-based	O
multi-player	O
role-playing	O
game	O
with	O
an	O
emphasis	O
on	O
magic	O
"	O
.	O
</s>
