<s>
Search	B-Application
engines	I-Application
,	O
including	O
web	B-Application
search	I-Application
engines	I-Application
,	O
selection-based	B-Application
search	I-Application
engines	I-Application
,	O
metasearch	B-Application
engines	I-Application
,	O
desktop	B-Application
search	I-Application
tools	I-Application
,	O
and	O
web	O
portals	O
and	O
vertical	O
market	O
websites	O
have	O
a	O
search	O
facility	O
for	O
online	O
databases	O
.	O
</s>
<s>
Name	O
LanguageBackend	O
ownershipAsk.com	O
MultilingualGoogle	O
Baidu	B-Application
ChineseBaidu	O
Brave	B-Application
Search	I-Application
MultilingualBrave	O
Dogpile	B-Application
EnglishMetasearch	O
engineDuckDuckGo	O
MultilingualMicrosoft	O
Bing	B-Application
Ecosia	O
MultilingualMicrosoft	O
Bing	B-Application
Elasticsearch	B-Application
Multilingual	O
until	O
2021	O
,	O
then	O
ElasticsearchExalead	O
MultilingualCloudview	O
Excite†	O
MultilingualMicrosoft	O
Bing	B-Application
Gigablast	B-Application
EnglishGoogle	O
MultilingualGoogle	O
HotBot	B-Application
EnglishMicrosoft	O
Bing	B-Application
Lycos	B-Application
MultilingualMicrosoft	O
Bing	B-Application
MetaCrawler	B-Application
EnglishMetasearch	O
engineMicrosoft	O
Bing	B-Application
MultilingualMicrosoft	O
Bing	B-Application
Mojeek	B-Application
MultilingualMojeek	O
Opensearch	B-Application
Multilingual	O
Petal	B-Application
MultilingualHuawei	O
Qwant	O
MultilingualMicrosoft	O
Bing	B-Application
Searx	B-Application
MultilingualMetasearch	O
engineSogou	O
MultilingualTencent	O
Startpage	B-Application
EnglishGoogle	O
Swisscows	B-Application
MultilingualMicrosoft	O
Bing	B-Application
WebCrawler	B-Application
EnglishMicrosoft	O
Bing	B-Application
YaCy	B-Application
Multilingual	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Name	O
Language	O
Country	O
Accoona	B-Application
Chinese	O
,	O
English	O
China	O
,	O
United	O
States	O
Biglobe	O
Japanese	O
Japan	O
Daum	O
Korean	O
Korea	O
Nate	B-Protocol
Korean	O
Korea	O
Egerin	B-Application
Kurdish	O
Kurdistan	O
(	O
Bing	B-Application
backend	O
)	O
Fireball	O
German	O
,	O
English	O
Germany	O
Goo	B-Application
Japanese	O
Japan	O
Leit.is	B-Application
Icelandic	O
,	O
English	O
Iceland	O
Maktoob	B-Application
Arabic	O
,	O
English	O
Arab	O
World	O
Miner.hu	B-Application
Hungarian	O
Hungary	O
Najdi.si	B-Application
Slovenian	O
Slovenia	O
Naver	B-Protocol
Korean	O
Korea	O
Parsijoo	O
Persian	O
Iran	O
Pipilika	B-Application
Bengali	O
,	O
English	O
Bangladesh	O
Rambler	B-Application
Russian	O
Russia	O
Rediff	O
India	O
Search.ch	O
Switzerland	B-Protocol
Sesam	O
Norway	O
,	O
Sweden	O
Seznam	B-Application
Czech	O
Czech	O
Republic	O
Walla	O
!	O
</s>
<s>
Israel	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Openverse	B-Application
,	O
search	B-Application
engine	I-Application
for	O
open	O
content	O
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Openverse	B-Application
,	O
search	B-Application
engine	I-Application
for	O
open	O
content	O
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
These	O
search	B-Application
engines	I-Application
work	O
across	O
the	O
BitTorrent	B-Protocol
protocol	I-Protocol
.	O
</s>
<s>
Yahoo	B-Application
!	I-Application
</s>
<s>
Desktop	B-Application
search	I-Application
engines	I-Application
listed	O
on	O
a	O
light	O
purple	O
background	O
are	O
no	O
longer	O
in	O
active	O
development	O
.	O
</s>
<s>
Name	O
Platform	O
Remarks	O
License	O
HP	B-General_Concept
Autonomy	I-General_Concept
Windows	B-Application
IDOL	O
Enterprise	O
Desktop	B-Application
Search	I-Application
,	O
HP	B-General_Concept
Autonomy	I-General_Concept
Universal	O
Search	O
.	O
</s>
<s>
Beagle	B-Language
Linux	B-Application
Open-source	O
desktop	B-Application
search	I-Application
tool	I-Application
for	O
Linux	B-Application
based	O
on	O
Lucene	B-Language
.	O
</s>
<s>
Copernic	O
Desktop	B-Application
Search	I-Application
WindowsMajor	O
desktop	B-Application
search	I-Application
program	O
.	O
</s>
<s>
DocFetcher	B-Application
Cross-platform	O
Open-source	O
desktop	B-Application
search	I-Application
tool	I-Application
for	O
Windows	B-Application
and	O
Linux	B-Application
,	O
based	O
on	O
Apache	B-Language
Lucene	I-Language
dtSearch	O
Desktop	O
Windows	B-Application
Everything	B-Application
Windows	B-Application
Find	O
files	O
and	O
folders	O
by	O
name	O
instantly	O
on	O
NTFS	O
volumes	O
GNOME	B-Application
Storage	I-Application
Linux	B-Application
Open-source	O
desktop	B-Application
search	I-Application
tool	I-Application
for	O
Unix/Linux	O
Google	B-Application
Desktop	I-Application
Linux	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
Windows	B-Application
Integrates	O
with	O
the	O
main	O
Google	B-Application
search	I-Application
engine	I-Application
page	O
.	O
</s>
<s>
As	O
of	O
September	O
14	O
,	O
2011	O
,	O
Google	B-Application
has	O
discontinued	O
this	O
product	O
.	O
</s>
<s>
ISYS	O
Search	B-Application
Software	I-Application
Windows	B-Application
ISYS:Desktop	B-Application
search	B-Application
software	I-Application
.	O
</s>
<s>
Locate32	B-Application
Windows	B-Application
Graphical	O
port	O
of	O
Unix	B-Application
's	O
locate	O
&	O
updatedb	O
Lookeen	B-Operating_System
Windows	B-Application
Desktop	B-Application
search	I-Application
product	O
with	O
Outlook	O
plugin	O
and	O
limited	O
support	O
for	O
other	O
formats	O
via	O
IFilters	O
,	O
uses	O
Lucene	B-Language
search	B-Application
engine	I-Application
.	O
</s>
<s>
Nepomuk	B-Language
Linux	B-Application
Open-source	O
semantic	O
desktop	B-Application
search	I-Application
tool	I-Application
for	O
Linux	B-Application
.	O
</s>
<s>
Has	O
been	O
replaced	O
by	O
Baloo	O
in	O
KDE	B-Language
Applications	I-Language
from	O
release	O
4.13	O
onward	O
.	O
</s>
<s>
License	O
SA	O
3.0	O
and	O
the	O
GNU	O
Free	O
Documentation	O
License	O
1.2	O
Recoll	B-Language
Linux	B-Application
,	O
Unix	B-Application
,	O
Windows	B-Application
,	O
macOS	B-Operating_System
Open-source	O
desktop	B-Application
search	I-Application
tool	I-Application
for	O
Unix/Linux	O
Spotlight	B-Application
macOS	I-Application
Found	O
in	O
Apple	B-Operating_System
Mac	I-Operating_System
OS	I-Operating_System
X	I-Operating_System
"	O
Tiger	B-Application
"	O
and	O
later	O
OS	B-Operating_System
X	I-Operating_System
releases	O
.	O
</s>
<s>
Strigi	B-Language
Linux	B-Application
,	O
Unix	B-Application
,	O
Solaris	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
and	O
Windows	B-Application
Cross-platform	O
open-source	O
desktop	B-Application
search	I-Application
engine	I-Application
Terrier	B-Application
Search	I-Application
Engine	I-Application
Linux	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
Unix	B-Application
Desktop	B-Application
search	I-Application
for	O
Windows	B-Application
,	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
(	O
Tiger	B-Application
)	O
,	O
Unix/Linux	O
.	O
</s>
<s>
Tracker	B-Application
Linux	B-Application
,	O
Unix	B-Application
Open-source	O
desktop	B-Application
search	I-Application
tool	I-Application
for	O
Unix/Linux	O
Tropes	B-Application
Zoom	I-Application
Windows	B-Application
Semantic	O
Search	B-Application
Engine	I-Application
(	O
no	O
longer	O
available	O
)	O
Unity	B-Application
Dash	I-Application
Linux	B-Application
Part	O
of	O
Ubuntu	O
Desktop	O
,	O
LGPL	O
v2.1	O
Windows	B-Application
Search	I-Application
Windows	B-Application
Part	O
of	O
Windows	B-Application
Vista	I-Application
and	O
later	O
OSs	O
.	O
</s>
<s>
Available	O
as	O
Windows	B-Application
Desktop	B-Application
Search	I-Application
for	O
Windows	B-Application
XP	I-Application
and	O
Server	B-Application
2003	I-Application
.	O
</s>
<s>
Name	O
Backend	O
ownership	O
DemiseiWonAsk.comShut	O
down	O
after	O
AT&T	O
mergerTeomaAsk.comMerged	O
to	O
Ask.com	B-Application
which	O
still	O
uses	O
its	O
algorithmsA9.comMicrosoft	O
BingRedirect	O
to	O
Amazon	O
homepage	O
(	O
parent	O
company	O
)	O
AOLGoogle	O
until	O
2015	O
,	O
then	O
Microsoft	B-Application
Bing	I-Application
Merged	O
to	O
Yahoo	B-Application
!	O
Alexa	O
InternetMicrosoft	O
BingBought	O
by	O
Amazon	O
in	O
1999	O
,	O
shut	O
down	O
in	O
2021Ciao	O
!	O
Microsoft	O
BingShut	O
down	O
in	O
2018Ms	O
.	O
</s>
<s>
AlltheWeb	B-Application
(	O
acquired	O
by	O
Yahoo	B-Application
!	I-Application
)	O
</s>
<s>
AltaVista	O
(	O
acquired	O
by	O
Yahoo	B-Application
!	I-Application
</s>
<s>
Overture.com	B-Application
(	O
formerly	O
GoTo.com,	O
now	O
Yahoo	B-Application
!	I-Application
</s>
