<s>
dnd	B-Application
is	O
a	O
role-playing	O
video	O
game	O
.	O
</s>
<s>
The	O
name	O
dnd	B-Application
is	O
derived	O
from	O
the	O
abbreviation	O
"	O
D&D	O
"	O
from	O
the	O
original	O
tabletop	O
role-playing	O
game	O
Dungeons	O
&	O
Dragons	O
,	O
which	O
was	O
released	O
in	O
1974	O
.	O
</s>
<s>
dnd	B-Application
was	O
written	O
in	O
the	O
TUTOR	B-Language
programming	I-Language
language	I-Language
for	O
the	O
PLATO	B-Operating_System
system	I-Operating_System
by	O
Gary	O
Whisenhunt	O
and	O
Ray	O
Wood	O
at	O
Southern	O
Illinois	O
University	O
in	O
1974	O
and	O
1975	O
.	O
</s>
<s>
dnd	B-Application
is	O
notable	O
for	O
being	O
the	O
first	O
interactive	O
game	O
to	O
feature	O
what	O
would	O
later	O
be	O
referred	O
to	O
as	O
bosses	O
.	O
</s>
<s>
In	O
dnd	B-Application
,	O
players	O
create	O
a	O
character	O
and	O
venture	O
into	O
the	O
multi-level	O
Whisenwood	O
Dungeon	O
(	O
a	O
portmanteau	O
of	O
the	O
authors	O
 '	O
last	O
names	O
)	O
in	O
search	O
of	O
two	O
ultimate	O
treasures	O
:	O
the	O
grail	O
and	O
the	O
orb	O
.	O
</s>
<s>
As	O
players	O
complete	O
each	O
level	O
,	O
they	O
are	O
allowed	O
to	O
advance	O
to	O
the	O
next	O
;	O
however	O
,	O
players	O
may	O
return	O
to	O
previous	O
levels	O
and	O
leave	O
the	O
dungeon	O
altogether	O
making	O
dnd	B-Application
one	O
of	O
the	O
first	O
video	O
games	O
to	O
use	O
non-linear	O
progression	O
.	O
</s>
<s>
Teleporters	B-General_Concept
move	O
characters	O
between	O
dungeon	O
levels	O
.	O
</s>
