<s>
A	O
search	B-Application
appliance	I-Application
(	O
SA	O
)	O
is	O
a	O
type	O
of	O
computer	B-Architecture
appliance	I-Architecture
which	O
is	O
attached	O
to	O
a	O
corporate	B-General_Concept
network	I-General_Concept
for	O
the	O
purpose	O
of	O
indexing	O
the	O
content	O
shared	O
across	O
that	O
network	O
in	O
a	O
way	O
that	O
is	O
similar	O
to	O
a	O
web	B-Application
search	I-Application
engine	I-Application
.	O
</s>
<s>
A	O
search	B-Application
appliance	I-Application
is	O
usually	O
made	O
up	O
of	O
several	O
components	O
.	O
</s>
<s>
The	O
gathering	O
component	O
is	O
usually	O
a	O
web	B-Application
crawler	I-Application
or	O
file	O
crawler	O
that	O
goes	O
out	O
on	O
a	O
network	O
or	O
the	O
Internet	O
and	O
gathers	O
files	O
and	O
data	O
from	O
specified	O
locations	O
.	O
</s>
<s>
This	O
might	O
include	O
SMB	B-Operating_System
shared	O
directories	O
,	O
NFS	B-Protocol
shared	O
directories	O
,	O
databases	O
,	O
and	O
web	O
pages	O
.	O
</s>
<s>
The	O
crawler	O
might	O
either	O
copy	O
files	O
to	O
the	O
search	B-Application
appliance	I-Application
,	O
or	O
only	O
copy	O
the	O
metadata	O
about	O
the	O
file	O
.	O
</s>
<s>
The	O
search	O
component	O
searches	O
through	O
the	O
stored	O
metadata	O
from	O
the	O
files	O
and	O
provides	O
the	O
information	O
to	O
the	O
search	O
interface	O
in	O
the	O
form	O
of	O
query	B-Library
results	O
.	O
</s>
<s>
It	O
also	O
can	O
provide	O
links	O
to	O
the	O
copies	O
of	O
the	O
files	O
stored	O
on	O
the	O
search	B-Application
appliance	I-Application
,	O
or	O
it	O
can	O
provide	O
links	O
to	O
the	O
original	O
files	O
in	O
the	O
source	O
locations	O
.	O
</s>
<s>
The	O
search	O
interface	O
is	O
the	O
component	O
where	O
users	O
compose	O
their	O
search	O
queries	B-Library
.	O
</s>
<s>
It	O
provides	O
instructions	O
to	O
the	O
search	O
component	O
and	O
displays	O
query	B-Library
results	O
to	O
the	O
user	O
.	O
</s>
