<s>
Walhello	B-Application
was	O
a	O
spider	B-Protocol
based	O
search	B-Application
engine	I-Application
developed	O
in	O
the	O
Netherlands	O
.	O
</s>
<s>
The	O
Walhello	B-Application
spider	B-Protocol
is	O
called	O
"	O
appie	O
"	O
.	O
</s>
<s>
The	O
Walhello	B-Application
search	B-Application
engine	I-Application
was	O
created	O
in	O
2000	O
.	O
</s>
<s>
Walhello	B-Application
's	O
claims	O
to	O
have	O
indexed	O
over	O
2	O
billion	O
pages	O
,	O
significantly	O
less	O
than	O
larger	O
search	B-Application
engines	I-Application
such	O
as	O
Google	B-Application
or	O
Yahoo	B-Application
.	O
</s>
<s>
An	O
advanced	O
search	O
option	O
proximity	B-Application
search	I-Application
functionality	O
was	O
provided	O
,	O
allowing	O
users	O
to	O
define	O
the	O
proximity	O
in	O
which	O
all	O
search	O
items	O
must	O
be	O
found	O
on	O
a	O
website	O
.	O
</s>
<s>
Walhello	B-Application
also	O
allowed	O
users	O
to	O
specify	O
the	O
language	O
in	O
which	O
search	B-Application
results	I-Application
must	O
be	O
found	O
.	O
</s>
<s>
The	O
search	B-Application
engine	I-Application
ran	O
on	O
a	O
cluster	O
of	O
Linux	B-Application
servers	O
,	O
and	O
is	O
programmed	O
in	O
C	B-Language
.	O
Walhello	B-Application
also	O
provided	O
an	O
advertising	O
service	O
.	O
</s>
<s>
The	O
search	B-Application
engine	I-Application
had	O
a	O
small	O
second	O
index	O
which	O
contained	O
only	O
paid	O
listings	O
,	O
and	O
are	O
shown	O
beside	O
search	B-Application
results	I-Application
if	O
they	O
match	O
the	O
search	O
query	O
.	O
</s>
