<s>
Mystery	B-Application
Mansion	I-Application
is	O
the	O
name	O
of	O
a	O
text	O
adventure	B-Application
written	O
in	O
1978	O
–	O
1981	O
by	O
Bill	O
Wolpert	O
while	O
at	O
the	O
Naval	O
Undersea	O
Warfare	O
Center	O
in	O
Keyport	O
,	O
Washington	O
.	O
</s>
<s>
Although	O
the	O
development	O
dates	O
make	O
it	O
contemporaneous	O
with	O
other	O
seminal	O
interactive	O
fiction	O
games	O
such	O
as	O
Adventure	B-Application
and	O
Dungeon	O
(	O
which	O
went	O
on	O
to	O
become	O
the	O
Zork	B-Application
series	O
from	O
Infocom	O
)	O
,	O
it	O
remains	O
relatively	O
unknown	O
due	O
to	O
the	O
specialized	O
computers	O
and	O
operating	O
systems	O
on	O
which	O
it	O
ran	O
.	O
</s>
