<s>
The	O
Dipmeter	B-Application
Advisor	I-Application
was	O
an	O
early	O
expert	B-Application
system	I-Application
developed	O
in	O
the	O
1980s	O
by	O
Schlumberger	O
with	O
the	O
help	O
of	O
artificial-intelligence	O
workers	O
at	O
MIT	O
to	O
aid	O
in	O
the	O
analysis	O
of	O
data	O
gathered	O
during	O
oil	O
exploration	O
.	O
</s>
<s>
The	O
Advisor	O
was	O
generally	O
not	O
merely	O
an	O
inference	O
engine	O
and	O
a	O
knowledge	O
base	O
of	O
~	O
90	O
rules	O
,	O
but	O
generally	O
was	O
a	O
full-fledged	O
workstation	B-Device
,	O
running	O
on	O
one	O
of	O
Xerox	O
's	O
1100	O
Dolphin	O
Lisp	B-Operating_System
machines	I-Operating_System
(	O
or	O
in	O
general	O
on	O
Xerox	O
's	O
"	O
1100	O
Series	O
Scientific	O
Information	O
Processors	O
"	O
line	O
)	O
and	O
written	O
in	O
INTERLISP-D	B-Language
,	O
with	O
a	O
pattern	O
recognition	O
layer	O
which	O
in	O
turn	O
fed	O
a	O
GUI	B-Application
menu-driven	O
interface	O
.	O
</s>
<s>
The	O
AI	O
rules	O
of	O
the	O
Dipmeter	B-Application
Advisor	I-Application
were	O
primarily	O
derived	O
from	O
Al	O
Gilreath	O
,	O
a	O
Schlumberger	O
interpretation	O
engineer	O
who	O
developed	O
the	O
"	O
red	O
,	O
green	O
,	O
blue	O
"	O
pattern	O
method	O
of	O
dipmeter	O
interpretation	O
.	O
</s>
<s>
Unfortunately	O
this	O
method	O
had	O
limited	O
application	O
in	O
more	O
complex	O
geological	O
environments	O
outside	O
the	O
Gulf	O
Coast	O
,	O
and	O
the	O
Dipmeter	B-Application
Advisor	I-Application
was	O
primarily	O
used	O
within	O
Schlumberger	O
as	O
a	O
graphical	O
display	O
tool	O
to	O
assist	O
interpretation	O
by	O
trained	O
geoscientists	O
,	O
rather	O
than	O
as	O
an	O
AI	O
tool	O
for	O
use	O
by	O
novice	O
interpreters	O
.	O
</s>
<s>
However	O
,	O
the	O
tool	O
pioneered	O
a	O
new	O
approach	O
to	O
workstation-assisted	O
graphical	O
interpretation	O
of	O
geological	O
information	O
.	O
</s>
