<s>
Google	B-Language
Quick	I-Language
Search	I-Language
Box	I-Language
(	O
GQSB	O
)	O
is	O
an	O
application	O
launcher	O
and	O
desktop	B-Application
search	O
tool	O
developed	O
by	O
Google	B-Application
for	O
Mac	B-Device
OS	I-Device
X	I-Device
computers	O
.	O
</s>
<s>
Like	O
other	O
Google	B-Application
products	O
such	O
as	O
the	B-Application
Chrome	I-Application
browser	I-Application
,	O
QSB	O
is	O
open-source	O
software	O
.	O
</s>
<s>
However	O
,	O
just	O
as	O
with	O
Chrome	B-Application
,	O
Google	B-Application
distributes	O
official	O
builds	O
with	O
extra	O
functionality	O
.	O
</s>
<s>
In	O
the	O
case	O
of	O
QSB	O
,	O
this	O
includes	O
plugin	O
validation	O
,	O
auto-update	O
,	O
and	O
Google-branded	O
icons	O
.	O
</s>
<s>
In	O
Mac	B-Device
OS	I-Device
X	I-Device
Snow	I-Device
Leopard	I-Device
,	O
QSB	O
has	O
replaced	O
Google	B-Application
Desktop	I-Application
.	O
</s>
<s>
QSB	O
is	O
similar	O
to	O
another	O
Google	B-Application
product	O
,	O
Google	B-Application
Desktop	I-Application
.	O
</s>
<s>
Operating	O
system	O
compatibility	O
:	O
While	O
Google	B-Application
Desktop	I-Application
is	O
cross-platform	O
,	O
QSB	O
is	O
at	O
present	O
Mac-only	O
software	O
.	O
</s>
<s>
Google	B-Application
currently	O
has	O
an	O
app	B-Application
that	O
allows	O
users	O
to	O
search	B-Application
the	I-Application
web	I-Application
using	O
the	O
iPhone	B-Device
.	O
</s>
<s>
Search	O
methodology	O
:	O
Google	B-Application
Desktop	I-Application
maintains	O
its	O
own	O
index	O
of	O
files	O
for	O
searching	O
.	O
</s>
<s>
It	O
also	O
indexes	O
Gmail	B-Application
messages	O
.	O
</s>
<s>
QSB	O
uses	O
macOS	B-Application
's	O
built-in	O
indexing	O
technology	O
,	O
Spotlight	B-Application
.	O
</s>
<s>
Because	O
of	O
this	O
,	O
QSB	O
is	O
less	O
resource-intensive	O
than	O
Google	B-Application
Desktop	I-Application
.	O
</s>
<s>
QSB	O
does	O
not	O
support	O
indexing	O
of	O
Gmail	B-Application
messages	O
(	O
because	O
Spotlight	B-Application
does	O
n't	O
)	O
,	O
and	O
some	O
aspects	O
do	O
not	O
function	O
if	O
Spotlight	B-Application
is	O
disabled	O
.	O
</s>
<s>
Search	O
philosophy	O
:	O
Google	B-Application
Desktop	I-Application
offers	O
a	O
search-only	O
paradigm	O
.	O
</s>
<s>
In	O
this	O
respect	O
,	O
it	O
is	O
similar	O
to	O
another	O
macOS	B-Application
software	O
tool	O
,	O
Quicksilver	B-Operating_System
.	O
</s>
<s>
The	O
developer	O
of	O
Quicksilver	B-Operating_System
,	O
Nicholas	O
Jitkoff	O
is	O
employed	O
by	O
Google	B-Application
and	O
is	O
one	O
of	O
the	O
lead	O
developers	O
of	O
QSB	O
.	O
</s>
<s>
Extensibility	O
:	O
Both	O
QSB	O
and	O
Google	B-Application
Desktop	I-Application
offer	O
plugin	O
APIs	O
.	O
</s>
<s>
Google	B-Application
indicates	O
that	O
there	O
is	O
more	O
leeway	O
to	O
expand	O
QSB	O
.	O
</s>
<s>
Users	O
have	O
noted	O
that	O
the	O
functionality	O
as	O
compared	O
to	O
Desktop	B-Application
is	O
reduced	O
,	O
especially	O
in	O
the	O
area	O
of	O
in-document	O
text	O
searching	O
,	O
Gmail	B-Application
message	O
searching	O
and	O
web	O
history	O
searching	O
.	O
</s>
