<s>
CiteULike	B-Application
was	O
a	O
web	O
service	O
which	O
allowed	O
users	O
to	O
save	O
and	O
share	O
citations	O
to	O
academic	O
papers	O
.	O
</s>
<s>
Based	O
on	O
the	O
principle	O
of	O
social	B-General_Concept
bookmarking	I-General_Concept
,	O
the	O
site	O
worked	O
to	O
promote	O
and	O
to	O
develop	O
the	O
sharing	O
of	O
scientific	O
references	O
amongst	O
researchers	O
.	O
</s>
<s>
In	O
the	O
same	O
way	O
that	O
it	O
is	O
possible	O
to	O
catalog	O
web	O
pages	O
(	O
with	O
Furl	O
and	O
delicious	B-Application
)	O
or	O
photographs	O
(	O
with	O
Flickr	B-Algorithm
)	O
,	O
scientists	O
could	O
share	O
citation	O
information	O
using	O
CiteULike	B-Application
.	O
</s>
<s>
Richard	O
Cameron	O
developed	O
CiteULike	B-Application
in	O
November	O
2004	O
and	O
in	O
2006	O
Oversity	O
Ltd	O
.	O
was	O
established	O
to	O
develop	O
and	O
support	O
CiteULike	B-Application
.	O
</s>
<s>
In	O
February	O
2019	O
,	O
CiteULike	B-Application
announced	O
that	O
it	O
would	O
be	O
ceasing	O
operations	O
as	O
of	O
March	O
30	O
,	O
2019	O
.	O
</s>
<s>
When	O
browsing	O
issues	O
of	O
research	O
journals	O
,	O
small	O
scripts	B-Language
stored	O
in	O
bookmarks	O
(	O
bookmarklets	B-Language
)	O
allowed	O
one	O
to	O
import	O
articles	O
from	O
repositories	O
like	O
PubMed	B-Library
,	O
and	O
CiteULike	B-Application
supported	O
many	O
more	O
.	O
</s>
<s>
Users	O
could	O
organize	O
their	O
libraries	O
with	O
freely	O
chosen	O
tags	B-General_Concept
and	O
this	O
produces	O
a	O
folksonomy	B-General_Concept
of	O
academic	O
interests	O
.	O
</s>
<s>
Initially	O
,	O
one	O
added	O
a	O
reference	O
to	O
CiteULike	B-Application
directly	O
from	O
within	O
a	O
web	B-Application
browser	I-Application
,	O
without	O
needing	O
a	O
separate	O
program	O
.	O
</s>
<s>
For	O
common	O
online	O
databases	O
like	O
PubMed	B-Library
,	O
author	O
names	O
,	O
title	O
,	O
and	O
other	O
details	O
were	O
imported	O
automatically	O
.	O
</s>
<s>
One	O
could	O
manually	O
add	O
tags	B-General_Concept
for	O
grouping	O
of	O
references	O
.	O
</s>
<s>
References	O
could	O
later	O
be	O
exported	O
via	O
BibTeX	B-Language
or	O
EndNote	B-Library
to	O
be	O
used	O
on	O
local	O
computers	O
.	O
</s>
<s>
CiteULike	B-Application
provided	O
bookmarklets	B-Language
to	O
quickly	O
add	O
references	O
from	O
the	O
web	O
pages	O
of	O
the	O
most	O
common	O
sites	O
.	O
</s>
<s>
These	O
small	O
scripts	B-Language
read	O
the	O
citation	O
information	O
from	O
the	O
web	O
page	O
and	O
imported	O
into	O
the	O
CiteULike	B-Application
database	O
for	O
the	O
currently	O
logged	O
in	O
user	O
.	O
</s>
<s>
Sites	O
supported	O
for	O
semi-automatic	O
import	O
included	O
Amazon.com,	O
arXiv.org,	O
JSTOR	O
,	O
PLoS	O
,	O
PubMed	B-Library
,	O
SpringerLink	O
,	O
and	O
ScienceDirect	O
.	O
</s>
<s>
Entries	O
could	O
be	O
tagged	B-General_Concept
for	O
easier	O
retrieval	O
and	O
organisation	O
.	O
</s>
<s>
More	O
frequent	O
tags	B-General_Concept
were	O
displayed	O
in	O
a	O
proportionally	O
larger	O
font	O
.	O
</s>
<s>
Tags	B-General_Concept
could	O
be	O
clicked	O
to	O
call	O
up	O
articles	O
containing	O
this	O
tag	B-General_Concept
.	O
</s>
<s>
Users	O
of	O
CiteULike	B-Application
thus	O
automatically	O
shared	O
all	O
their	O
public	O
entries	O
with	O
other	O
users	O
.	O
</s>
<s>
The	O
tags	B-General_Concept
assigned	O
to	O
public	O
entries	O
contributed	O
to	O
the	O
site-wide	O
tag	B-General_Concept
network	O
.	O
</s>
<s>
All	O
public	O
references	O
could	O
also	O
be	O
searched	O
and	O
filtered	O
by	O
tag	B-General_Concept
.	O
</s>
<s>
On	O
line	O
CiteULike	B-Application
entries	O
could	O
be	O
downloaded	O
to	O
a	O
local	O
computer	O
by	O
means	O
of	O
export	O
functions	O
.	O
</s>
<s>
One	O
export	O
format	O
was	O
BibTeX	B-Language
,	O
the	O
referencing	O
system	O
used	O
in	O
TeX	B-Application
and	O
LaTeX	B-Application
.	O
</s>
<s>
The	O
BibTeX	B-Language
output	O
could	O
also	O
be	O
imported	O
directly	O
into	O
Overleaf	B-General_Concept
.	O
</s>
<s>
The	O
RIS	O
file	O
format	O
was	O
also	O
available	O
for	O
commercial	O
bibliography	O
programs	O
such	O
as	O
EndNote	B-Library
or	O
Reference	B-Application
Manager	I-Application
.	O
</s>
<s>
It	O
also	O
allowed	O
import	O
into	O
the	O
free	O
Zotero	B-Application
bibliography	O
extension	O
of	O
Firefox	B-Application
.	O
</s>
<s>
CiteULike	B-Application
gave	O
access	O
to	O
personal	O
or	O
shared	O
bibliographies	O
directly	O
from	O
the	O
web	O
.	O
</s>
<s>
It	O
allowed	O
one	O
to	O
see	O
what	O
other	O
people	O
had	O
posted	O
publicly	O
,	O
which	O
tags	B-General_Concept
they	O
had	O
added	O
,	O
and	O
how	O
they	O
had	O
commented	O
and	O
rated	O
a	O
paper	O
.	O
</s>
<s>
CiteULike	B-Application
was	O
written	O
in	O
Tcl	B-Operating_System
,	O
with	O
user	O
contributed	O
plugins	B-Application
in	O
Python	B-Language
,	O
Perl	B-Language
,	O
Ruby	B-Language
and	O
Tcl	B-Operating_System
;	O
some	O
additional	O
modules	O
were	O
written	O
in	O
Java	B-Language
;	O
data	O
were	O
stored	O
using	O
PostgreSQL	B-Application
There	O
was	O
no	O
API	B-Application
but	O
plugins	B-Application
could	O
be	O
contributed	O
using	O
Subversion	B-Application
.	O
</s>
<s>
The	O
software	O
behind	O
the	O
service	O
was	O
closed	B-Application
source	I-Application
,	O
but	O
the	O
dataset	O
collected	O
by	O
the	O
users	O
was	O
in	O
the	O
public	O
domain	O
.	O
</s>
<s>
CiteULike	B-Application
was	O
created	O
in	O
November	O
2004	O
and	O
further	O
developed	O
in	O
December	O
2006	O
,	O
running	O
until	O
March	O
2019	O
.	O
</s>
