<s>
is	O
a	O
free	B-Application
software	I-Application
indexing	O
and	O
searching	B-Application
system	O
created	O
in	O
1995	O
by	O
Andrew	O
Scherpbier	O
while	O
he	O
was	O
employed	O
at	O
San	O
Diego	O
State	O
University	O
.	O
</s>
<s>
It	O
can	O
provide	O
a	O
search	B-Application
engine	I-Application
for	O
a	O
single	O
website	O
.	O
</s>
<s>
It	O
includes	O
three	O
groups	O
of	O
files	O
:	O
a	O
set	O
of	O
tools	O
for	O
indexing	O
,	O
a	O
set	O
of	O
tools	O
for	O
searching	B-Application
,	O
and	O
a	O
set	O
of	O
HTML	O
files	O
for	O
building	O
the	O
user	O
interface	O
to	O
access	O
the	O
search	B-Application
engine	I-Application
.	O
</s>
<s>
works	O
differently	O
from	O
most	O
search	B-Application
engines	I-Application
as	O
most	O
engines	O
use	O
a	O
two-step	O
process	O
,	O
building	O
an	O
index	B-Application
and	O
searching	B-Application
it	O
.	O
</s>
<s>
indexes	O
pages	O
in	O
full	O
,	O
then	O
processes	O
the	O
pages	O
into	O
a	O
searchable	B-Application
form	O
later	O
using	O
soundex	B-Algorithm
and	O
metaphone	B-Algorithm
.	O
</s>
<s>
At	O
one	O
time	O
,	O
over	O
500	O
organizations	O
used	O
to	O
index	B-Application
sites	O
they	O
owned	O
.	O
</s>
<s>
Notable	O
sites	O
included	O
Blizzard	O
Entertainment	O
,	O
Greenpeace	O
,	O
and	O
The	B-Operating_System
Mozilla	I-Operating_System
Foundation	I-Operating_System
.	O
</s>
<s>
Only	O
sporadic	O
maintenance	O
is	O
in	O
evidence	O
since	O
that	O
date	O
at	O
the	O
project	O
's	O
bug	B-Error_Name
reporting	O
page	O
.	O
</s>
<s>
It	O
was	O
used	O
by	O
the	B-Application
GNU	I-Application
project	I-Application
's	O
website	O
for	O
a	O
long	O
time	O
but	O
was	O
replaced	O
in	O
2008	O
with	O
Hyper	O
Estraier	O
.	O
</s>
