<s>
Dungeon	B-Application
was	O
one	O
of	O
the	O
earliest	O
role-playing	O
video	O
games	O
,	O
running	O
on	O
PDP-10	B-Device
mainframe	B-Architecture
computers	I-Architecture
manufactured	O
by	O
Digital	O
Equipment	O
Corporation	O
.	O
</s>
<s>
Dungeon	B-Application
was	O
written	O
in	O
either	O
1975	O
or	O
1976	O
by	O
Don	O
Daglow	O
,	O
then	O
a	O
student	O
at	O
Claremont	O
University	O
Center	O
(	O
since	O
renamed	O
Claremont	O
Graduate	O
University	O
)	O
.	O
</s>
<s>
The	O
game	O
was	O
an	O
unlicensed	O
implementation	O
of	O
the	O
new	O
tabletop	O
role-playing	O
game	O
Dungeons	B-Application
&	O
Dragons	O
(	O
D&D	O
)	O
and	O
described	O
the	O
movements	O
of	O
a	O
multi-player	O
party	O
through	O
a	O
monster-inhabited	O
dungeon	B-Application
.	O
</s>
<s>
Daglow	O
wrote	O
in	O
1988	O
,	O
"	O
In	O
the	O
mid-seventies	O
I	O
had	O
a	O
fully	O
functioning	O
fantasy	O
role-playing	O
game	O
on	O
the	O
PDP-10	B-Device
,	O
with	O
both	O
ranged	O
and	O
melee	O
combat	O
,	O
lines	O
of	O
sight	O
,	O
auto-mapping	O
and	O
NPC	O
's	O
with	O
discrete	O
AI.	O
"	O
</s>
<s>
Its	O
use	O
of	O
computer	O
graphics	O
consisted	O
of	O
top-down	O
dungeon	B-Application
maps	O
that	O
showed	O
the	O
portions	O
of	O
the	O
playfield	O
the	O
party	O
had	O
seen	O
,	O
allowing	O
for	O
light	O
or	O
darkness	O
,	O
the	O
different	O
"	O
infravision	O
"	O
abilities	O
of	O
elves	O
,	O
dwarves	O
,	O
etc	O
.	O
</s>
<s>
This	O
advancement	O
was	O
possible	O
because	O
many	O
university	O
computer	O
terminals	O
had	O
switched	O
by	O
the	O
mid-1970s	O
to	O
CRT	B-Device
screens	I-Device
,	O
which	O
could	O
be	O
refreshed	O
with	O
text	O
in	O
a	O
few	O
seconds	O
instead	O
of	O
a	O
minute	O
or	O
more	O
.	O
</s>
<s>
While	O
Dungeon	B-Application
was	O
widely	O
available	O
via	O
DECUS	O
,	O
it	O
was	O
picked	O
up	O
by	O
fewer	O
universities	O
and	O
systems	O
in	O
the	O
mid-1970s	O
than	O
Daglow	O
's	O
earlier	O
Star	O
Trek	O
video	O
game	O
had	O
been	O
in	O
1971	O
,	O
primarily	O
because	O
it	O
took	O
a	O
then-significant	O
36K	O
of	O
system	O
RAM	B-Architecture
versus	O
32K	O
for	O
Star	O
Trek	O
.	O
</s>
<s>
1980	O
)	O
DECUS	O
distributed	O
another	O
game	O
named	O
Dungeon	B-Application
,	O
that	O
was	O
in	O
fact	O
a	O
version	O
of	O
Zork	O
,	O
a	O
text	O
adventure	O
game	O
that	O
would	O
later	O
become	O
the	O
model	O
for	O
early	O
MUDs	B-Application
.	O
</s>
<s>
A	O
third	O
game	O
called	O
Dungeon	B-Application
was	O
released	O
on	O
PLATO	B-Operating_System
in	O
1975	O
,	O
by	O
John	O
Daleske	O
,	O
Gary	O
Fritz	O
,	O
Jan	O
Good	O
,	O
Bill	O
Gammel	O
,	O
and	O
Mark	O
Nakada	O
.	O
</s>
