<s>
The	O
Universal	B-Operating_System
Edit	I-Operating_System
Button	I-Operating_System
is	O
a	O
browser	B-Protocol
extension	I-Protocol
that	O
provides	O
a	O
green	O
pencil	B-Device
icon	O
in	O
the	O
address	O
bar	O
of	O
a	O
web	B-Application
browser	I-Application
that	O
indicates	O
that	O
a	O
web	O
page	O
on	O
the	O
World	O
Wide	O
Web	O
(	O
most	O
often	O
a	O
wiki	B-Protocol
)	O
is	O
editable	O
.	O
</s>
<s>
It	O
is	O
similar	O
to	O
the	O
orange	O
"	O
broadcast	O
"	O
RSS	O
icon	O
(	O
)	O
that	O
indicates	O
that	O
there	O
is	O
a	O
web	B-General_Concept
feed	I-General_Concept
available	O
.	O
</s>
<s>
It	O
was	O
invented	O
by	O
a	O
collaborative	O
team	O
of	O
wiki	B-Protocol
enthusiasts	O
,	O
including	O
Ward	O
Cunningham	O
,	O
Jack	O
Herrick	O
,	O
and	O
many	O
others	O
.	O
</s>
<s>
After	O
the	O
next	O
RecentChangesCamp	O
,	O
coding	O
began	O
by	O
Travis	O
Derouin	O
,	O
Brion	B-Application
Vibber	I-Application
and	O
other	O
programmers	O
,	O
the	O
button	O
was	O
officially	O
launched	O
on	O
June	O
19	O
,	O
2008	O
.	O
</s>
<s>
Conversations	O
on	O
this	O
idea	O
started	O
at	O
RoCoCo	O
(	O
a	O
RecentChangesCamp	O
)	O
in	O
Montreal	O
in	O
2007	O
,	O
and	O
discussions	O
continued	O
on	O
the	O
AboutUs	O
wiki	B-Protocol
.	O
</s>
<s>
The	O
Universal	B-Operating_System
Editing	I-Operating_System
Button	I-Operating_System
(	O
UEB	O
)	O
is	O
intended	O
to	O
enable	O
an	O
internet	O
user	O
to	O
quickly	O
recognize	O
when	O
a	O
website	O
—	O
such	O
as	O
a	O
wiki	B-Protocol
—	O
may	O
be	O
edited	O
.	O
</s>
<s>
In	O
the	O
2000s	O
,	O
wikis	B-Protocol
spread	O
the	O
concept	O
that	O
the	O
web	O
could	O
be	O
editable	O
.	O
</s>
<s>
The	O
success	O
of	O
Wikipedia	O
,	O
and	O
the	O
increasing	O
utility	O
of	O
wikis	B-Protocol
like	O
wikiHow	O
,	O
AboutUs.org,	O
Wikivoyage	O
and	O
Wikia	O
demonstrated	O
the	O
possibility	O
that	O
open	O
editing	O
could	O
create	O
usable	O
information	O
resources	O
.	O
</s>
<s>
The	O
plug-ins	B-Application
on	O
the	O
browser	B-Application
side	O
recognize	O
the	O
specific	O
form	O
of	O
the	O
alternative	O
link	O
specification	O
in	O
HTML	O
fragment	O
:	O
</s>
<s>
Plug-ins	B-Application
are	O
currently	O
available	O
for	O
Firefox	B-Application
,	O
Opera	B-Application
,	O
Epiphany	B-Language
,	O
and	O
Chrome	B-Application
.	O
</s>
<s>
Websites	O
supporting	O
the	O
Universal	B-Operating_System
Edit	I-Operating_System
Button	I-Operating_System
include	O
wikiHow	O
,	O
AboutUs.org,	O
Wikimedia	O
(	O
including	O
Wikipedia	O
,	O
Wiktionary	O
,	O
Wikimedia	O
Commons	O
and	O
all	O
other	O
Wikimedia	O
projects	O
)	O
,	O
MediaWiki	B-Application
software	I-Application
,	O
DokuWiki	B-Protocol
,	O
MoinMoin	B-Application
,	O
PhpWiki	B-Language
,	O
Socialtext	O
,	O
TWiki	B-Language
,	O
the	O
Creative	O
Commons	O
wiki	B-Protocol
,	O
Foodista	O
,	O
Wikia	O
,	O
PBworks	O
,	O
WikkaWiki	O
,	O
Memory	O
Alpha	O
,	O
Wired	O
's	O
How-To	O
blog	O
,	O
WordPress	B-Application
(	O
as	O
a	O
plug-in	B-Application
)	O
,	O
and	O
many	O
others	O
.	O
</s>
