<s>
The	O
High	B-General_Concept
Performance	I-General_Concept
Knowledge	I-General_Concept
Bases	I-General_Concept
(	O
HPKB	B-General_Concept
)	O
was	O
a	O
DARPA	O
research	O
program	O
to	O
advance	O
the	O
technology	O
of	O
how	O
computers	O
acquire	O
,	O
represent	O
and	O
manipulate	O
knowledge	O
.	O
</s>
<s>
The	O
successor	O
of	O
the	O
HPKB	B-General_Concept
project	O
was	O
the	O
Rapid	O
Knowledge	O
Formation	O
(	O
RKF	O
)	O
project	O
.	O
</s>
<s>
The	O
primary	O
results	O
of	O
the	O
HPKB	B-General_Concept
project	O
was	O
to	O
focus	O
further	O
research	O
on	O
the	O
Knowledge	O
acquisition	O
bottleneck	O
problem	O
.	O
</s>
<s>
HPKB	B-General_Concept
was	O
divided	O
programmatically	O
into	O
three	O
groups	O
:	O
</s>
