<s>
Ubuntu	B-Language
Software	I-Language
Center	I-Language
,	O
or	O
simply	O
Software	O
Center	O
,	O
is	O
a	O
discontinued	O
high-level	O
graphical	O
front	O
end	O
for	O
the	O
APT/dpkg	O
package	B-Application
management	I-Application
system	I-Application
.	O
</s>
<s>
It	O
is	O
free	B-License
software	I-License
written	O
in	O
Python	B-Language
,	O
PyGTK/PyGObject	O
based	O
on	O
GTK	B-Application
.	O
</s>
<s>
The	O
program	O
was	O
created	O
for	O
adding	O
and	O
managing	O
repositories	B-Application
,	O
as	O
well	O
as	O
Ubuntu	B-Operating_System
Personal	O
Package	O
Archives	O
(	O
PPA	O
)	O
and	O
on	O
Ubuntu	B-Operating_System
,	O
the	O
Ubuntu	B-Language
Software	I-Language
Center	I-Language
also	O
allowed	O
users	O
to	O
purchase	O
commercial	O
applications	O
.	O
</s>
<s>
Development	O
was	O
ended	O
in	O
2015	O
and	O
in	O
Ubuntu	B-Operating_System
16.04	O
LTS	O
.	O
</s>
<s>
It	O
was	O
replaced	O
with	O
GNOME	B-Language
Software	I-Language
.	O
</s>
<s>
In	O
early	O
2009	O
Ubuntu	B-Operating_System
developers	O
noted	O
that	O
package	B-Application
management	I-Application
within	O
Ubuntu	B-Operating_System
could	O
be	O
improved	O
and	O
consolidated	O
.	O
</s>
<s>
Recent	O
releases	O
of	O
Ubuntu	B-Operating_System
,	O
such	O
as	O
Ubuntu	B-Operating_System
9.04	O
(	O
Jaunty	O
Jackalope	O
)	O
included	O
five	O
applications	O
for	O
package	B-Application
management	I-Application
which	O
consumed	O
space	O
and	O
other	O
resources	O
,	O
as	O
well	O
as	O
provide	O
confusion	O
to	O
users	O
.	O
</s>
<s>
Applications	O
could	O
be	O
downloaded	O
using	O
the	O
basic	O
Add/Remove	O
Applications	O
or	O
with	O
the	O
Synaptic	B-Language
Package	I-Language
Manager	I-Language
.	O
</s>
<s>
Ubuntu	B-Operating_System
developers	O
set	O
as	O
a	O
goal	O
:	O
</s>
<s>
Canonical	O
introduced	O
the	O
Software	O
Center	O
gradually	O
,	O
starting	O
with	O
Ubuntu	B-Operating_System
9.10	O
(	O
Karmic	O
Koala	O
)	O
with	O
complete	O
functionality	O
expected	O
by	O
Ubuntu	B-Operating_System
11.10	O
,	O
in	O
October	O
2011	O
.	O
</s>
<s>
Introduced	O
a	O
new	O
simple	O
interface	O
for	O
locating	O
,	O
installing	O
,	O
and	O
removing	O
software	O
,	O
with	O
better	O
security	O
based	O
on	O
PolicyKit	B-Language
instead	O
of	O
gksudo	B-Device
.	O
</s>
<s>
Added	O
user	O
rating	O
and	O
reviewing	O
software	O
,	O
and	O
the	O
ability	O
to	O
see	O
ratings	O
and	O
reviews	O
of	O
other	O
participating	O
Ubuntu	B-Operating_System
users	O
.	O
</s>
<s>
Software	O
Center	O
's	O
fifth	O
version	O
was	O
rewritten	O
in	O
GTK3	B-Application
,	O
improving	O
design	O
(	O
better	O
integration	O
with	O
system	O
theme	O
,	O
promoting	O
banner	O
added	O
,	O
nicer	O
listing	O
of	O
apps	O
)	O
,	O
start-up	O
time	O
was	O
improved	O
too	O
.	O
</s>
<s>
An	O
online	O
edition	O
of	O
the	O
Ubuntu	B-Language
Software	I-Language
Center	I-Language
was	O
released	O
,	O
the	O
Ubuntu	B-Operating_System
Apps	O
Directory	O
.	O
</s>
<s>
The	O
Web	O
store	O
shows	O
the	O
same	O
content	O
as	O
the	O
Software	O
Center	O
application	O
,	O
with	O
a	O
download	O
button	O
that	O
opens	O
the	O
application	O
if	O
running	O
Ubuntu	B-Operating_System
or	O
a	O
link	O
to	O
download	O
the	O
Ubuntu	B-Operating_System
operating	I-Operating_System
system	I-Operating_System
installer	O
if	O
running	O
a	O
different	O
operating	O
system	O
.	O
</s>
<s>
Ubuntu	B-Language
Software	I-Language
Center	I-Language
gained	O
new	O
monochrome	O
elements	O
.	O
</s>
<s>
Canonical	O
created	O
a	O
Web-based	O
developer	O
platform	O
to	O
help	O
programmers	O
to	O
create	O
applications	O
for	O
Ubuntu	B-Operating_System
.	O
</s>
<s>
The	O
application	O
still	O
works	O
for	O
installing	O
and	O
managing	O
free	B-License
software	I-License
applications	O
.	O
</s>
<s>
In	O
November	O
2015	O
Canonical	O
announced	O
that	O
development	O
would	O
end	O
and	O
the	O
application	O
would	O
be	O
replaced	O
by	O
GNOME	B-Language
Software	I-Language
in	O
Ubuntu	B-Operating_System
16.04	O
LTS	O
.	O
</s>
