<s>
STUDENT	O
is	O
an	O
early	O
artificial	B-Application
intelligence	I-Application
program	I-Application
that	O
solves	O
algebra	O
word	O
problems	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
Lisp	B-Language
by	O
Daniel	O
G	O
.	O
Bobrow	O
as	O
his	O
PhD	O
thesis	O
in	O
1964	O
(	O
Bobrow	O
1964	O
)	O
.	O
</s>
<s>
The	O
program	O
is	O
often	O
cited	O
as	O
an	O
early	O
accomplishment	O
of	O
AI	B-Application
in	O
natural	B-Language
language	I-Language
processing	I-Language
.	O
</s>
<s>
Within	O
Project	O
MAC	O
at	O
MIT	O
,	O
the	O
STUDENT	O
system	O
was	O
an	O
early	O
example	O
of	O
a	O
question	B-Algorithm
answering	I-Algorithm
software	O
which	O
uniquely	O
involved	O
natural	B-Language
language	I-Language
processing	I-Language
and	O
symbolic	B-Application
programming	I-Application
.	O
</s>
<s>
This	O
is	O
realized	O
with	O
a	O
layered	O
pipeline	O
which	O
consists	O
of	O
heuristics	B-Algorithm
for	O
pattern	O
transformation	O
.	O
</s>
<s>
The	O
rules	O
are	O
pre-programmed	O
by	O
the	O
software	O
developer	O
and	O
are	O
able	O
to	O
parse	B-Language
natural	O
language	O
.	O
</s>
<s>
More	O
powerful	O
techniques	O
for	O
natural	B-Language
language	I-Language
processing	I-Language
,	O
such	O
as	O
machine	O
learning	O
,	O
came	O
into	O
use	O
later	O
as	O
hardware	O
grew	O
more	O
capable	O
,	O
and	O
gained	O
popularity	O
over	O
simpler	O
rule-based	O
systems	O
.	O
</s>
