<s>
The	O
KDE	B-Language
Software	I-Language
Compilation	I-Language
(	O
KDE	B-Language
SC	I-Language
)	O
was	O
an	O
umbrella	O
term	O
for	O
the	O
desktop	O
environment	O
plus	O
a	O
range	O
of	O
included	O
applications	B-Application
produced	O
by	O
KDE	B-Application
.	O
</s>
<s>
From	O
its	O
1.0	O
release	O
in	O
July	O
1998	O
until	O
the	O
release	O
of	O
version	O
4.4	O
in	O
February	O
2010	O
,	O
the	O
Software	O
Compilation	O
was	O
simply	O
known	O
as	O
KDE	B-Application
,	O
which	O
stood	O
for	O
K	B-Application
Desktop	I-Application
Environment	I-Application
until	O
the	O
rebrand	O
.	O
</s>
<s>
The	O
then	O
called	O
KDE	B-Language
SC	I-Language
was	O
used	O
from	O
4.4	O
onward	O
until	O
the	O
final	O
release	O
4.14	O
in	O
July	O
2014	O
.	O
</s>
<s>
It	O
consisted	O
of	O
the	O
KDE	B-Language
Plasma	I-Language
4	I-Language
desktop	O
and	O
those	O
KDE	B-Language
applications	I-Language
,	O
whose	O
development	O
teams	O
chose	O
to	O
follow	O
the	O
Software	O
Compilation	O
's	O
release	O
schedule	O
.	O
</s>
<s>
After	O
that	O
,	O
the	O
KDE	B-Language
SC	I-Language
was	O
split	O
into	O
three	O
separate	O
product	O
entities	O
:	O
KDE	B-Language
Plasma	I-Language
,	O
KDE	B-Language
Frameworks	I-Language
and	O
KDE	B-Language
Applications	I-Language
,	O
each	O
with	O
their	O
own	O
independent	O
release	O
schedules	O
.	O
</s>
<s>
KDE	B-Application
was	O
founded	O
in	O
1996	O
by	O
Matthias	O
Ettrich	O
,	O
who	O
was	O
then	O
a	O
student	O
at	O
the	O
University	O
of	O
Tübingen	O
.	O
</s>
<s>
At	O
the	O
time	O
,	O
he	O
was	O
troubled	O
by	O
certain	O
aspects	O
of	O
the	O
Unix	B-Application
desktop	O
.	O
</s>
<s>
Among	O
his	O
qualms	O
was	O
that	O
none	O
of	O
the	O
applications	B-Application
looked	O
,	O
felt	O
,	O
or	O
worked	O
alike	O
.	O
</s>
<s>
He	O
proposed	O
the	O
formation	O
of	O
not	O
only	O
a	O
set	O
of	O
applications	B-Application
,	O
but	O
,	O
rather	O
,	O
a	O
desktop	O
environment	O
,	O
in	O
which	O
users	O
could	O
expect	O
things	O
to	O
look	O
,	O
feel	O
and	O
work	O
consistently	O
.	O
</s>
<s>
He	O
also	O
wanted	O
to	O
make	O
this	O
desktop	O
easy	O
to	O
use	O
;	O
one	O
of	O
his	O
complaints	O
with	O
desktop	B-Application
applications	I-Application
of	O
the	O
time	O
was	O
that	O
his	O
girlfriend	O
could	O
not	O
use	O
them	O
.	O
</s>
<s>
His	O
initial	O
Usenet	B-Application
post	O
spurred	O
a	O
lot	O
of	O
interest	O
,	O
and	O
the	O
KDE	B-Application
project	O
was	O
born	O
.	O
</s>
<s>
Ettrich	O
chose	O
to	O
use	O
Trolltech	O
's	O
Qt	B-Language
framework	I-Language
for	O
the	O
KDE	B-Application
project	O
.	O
</s>
<s>
Other	O
programmers	B-Application
quickly	O
started	O
developing	O
KDE/Qt	O
applications	B-Application
,	O
and	O
by	O
early	O
1997	O
,	O
a	O
few	O
applications	B-Application
were	O
being	O
released	O
.	O
</s>
<s>
On	O
12	O
July	O
1998	O
,	O
K	B-Language
Desktop	I-Language
Environment	I-Language
1.0	I-Language
was	O
released	O
.	O
</s>
<s>
In	O
November	O
1998	O
,	O
the	O
Qt	B-Language
toolkit	I-Language
was	O
dual-licensed	O
under	O
the	O
free/open	O
source	O
Q	B-Language
Public	I-Language
License	I-Language
(	O
QPL	B-Language
)	O
and	O
a	O
proprietary	B-Application
license	I-Application
for	O
proprietary	B-Application
software	I-Application
developers	B-Application
.	O
</s>
<s>
Debate	O
continued	O
about	O
compatibility	O
with	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
,	O
so	O
in	O
September	O
2000	O
,	O
Trolltech	O
made	O
the	O
Unix	B-Application
version	O
of	O
the	O
Qt	B-Language
libraries	I-Language
available	O
under	O
the	O
GPL	B-License
,	O
in	O
addition	O
to	O
the	O
QPL	B-Language
.	O
</s>
<s>
Trolltech	O
continued	O
to	O
require	O
licenses	O
for	O
developing	O
proprietary	B-Application
software	I-Application
with	O
Qt	B-Language
.	O
</s>
<s>
The	O
core	O
libraries	B-Library
of	O
KDE	B-Application
are	O
collectively	O
licensed	O
under	O
the	O
GNU	B-Application
LGPL	I-Application
,	O
but	O
the	O
only	O
way	O
for	O
proprietary	B-Application
software	I-Application
to	O
make	O
use	O
of	O
them	O
was	O
to	O
be	O
developed	O
under	O
the	O
terms	O
of	O
the	O
Qt	B-Language
proprietary	B-Application
license	I-Application
.	O
</s>
<s>
Beginning	O
23	O
October	O
2000	O
,	O
the	O
second	O
series	O
of	O
releases	O
,	O
K	B-Language
Desktop	I-Language
Environment	I-Language
2	I-Language
,	O
introduced	O
significant	O
technological	O
improvements	O
.	O
</s>
<s>
These	O
included	O
DCOP	B-Language
(	O
Desktop	B-Language
COmmunication	I-Language
Protocol	I-Language
)	O
,	O
KIO	B-Language
(	O
an	O
application	O
I/O	O
library	O
)	O
,	O
KParts	B-Language
(	O
a	O
component	B-Application
object	I-Application
model	I-Application
,	O
which	O
allows	O
an	O
application	O
to	O
embed	O
another	O
within	O
itself	O
)	O
,	O
and	O
KHTML	B-Language
(	O
an	O
HTML	B-Language
rendering	O
and	O
drawing	O
engine	O
)	O
.	O
</s>
<s>
The	O
third	B-Language
series	I-Language
was	O
much	O
larger	O
than	O
previous	O
series	O
,	O
consisting	O
of	O
six	O
major	O
releases	O
starting	O
on	O
3	O
April	O
2002	O
.	O
</s>
<s>
The	O
API	B-Application
changes	O
between	O
K	B-Language
Desktop	I-Language
Environment	I-Language
2	I-Language
and	O
K	B-Application
Desktop	I-Application
Environment	I-Application
3	O
were	O
comparatively	O
minor	O
,	O
meaning	O
that	O
the	O
KDE	B-Language
3	I-Language
can	O
be	O
seen	O
as	O
largely	O
a	O
continuation	O
of	O
the	O
K	B-Language
Desktop	I-Language
Environment	I-Language
2	I-Language
series	O
.	O
</s>
<s>
All	O
releases	O
of	O
K	B-Application
Desktop	I-Application
Environment	I-Application
3	O
were	O
built	O
upon	O
Qt3	O
,	O
which	O
was	O
only	O
released	O
under	O
the	O
GPL	B-License
for	O
Linux	O
and	O
Unix-like	B-Operating_System
operating	I-Operating_System
systems	I-Operating_System
,	O
including	O
Mac	B-Application
OS	I-Application
X	I-Application
.	O
</s>
<s>
It	O
is	O
marked	O
stable	O
running	O
on	O
Mac	B-Application
OS	I-Application
X	I-Application
since	O
2008	O
.	O
</s>
<s>
Unlike	O
KDE	B-Language
SC	I-Language
4	I-Language
,	O
however	O
,	O
it	O
requires	O
an	O
X11	B-Operating_System
server	I-Operating_System
to	O
operate	O
.	O
</s>
<s>
In	O
2002	O
,	O
members	O
of	O
the	O
KDE	B-Operating_System
on	I-Operating_System
Cygwin	I-Operating_System
project	O
began	O
porting	O
the	O
GPL	B-License
licensed	O
Qt/X11	O
code	O
base	O
to	O
Windows	B-Application
.	O
</s>
<s>
KDE	B-Language
Software	I-Language
Compilation	I-Language
4	I-Language
,	O
first	O
released	O
on	O
11	O
January	O
2008	O
,	O
is	O
based	O
on	O
Qt	B-Language
4	O
,	O
which	O
is	O
also	O
released	O
under	O
the	O
GPL	B-License
for	O
Windows	B-Application
and	O
Mac	B-Application
OS	I-Application
X	I-Application
.	O
</s>
<s>
Therefore	O
,	O
KDE	B-Language
SC	I-Language
4	I-Language
applications	B-Application
can	O
be	O
compiled	O
and	O
run	O
natively	O
on	O
these	O
operating	O
systems	O
as	O
well	O
.	O
</s>
<s>
KDE	B-Language
Software	I-Language
Compilation	I-Language
4	I-Language
on	O
Mac	B-Application
OS	I-Application
X	I-Application
is	O
currently	O
considered	O
beta	O
,	O
while	O
on	O
Windows	B-Application
it	O
is	O
not	O
in	O
the	O
final	O
state	O
,	O
so	O
applications	B-Application
can	O
be	O
unsuitable	O
for	O
day	O
to	O
day	O
use	O
.	O
</s>
<s>
KDE	B-Language
SC	I-Language
4	I-Language
includes	O
many	O
new	O
technologies	O
and	O
technical	O
changes	O
.	O
</s>
<s>
The	O
centerpiece	O
is	O
a	O
redesigned	O
desktop	O
and	O
panels	O
collectively	O
called	O
Plasma	B-Language
,	O
which	O
replaces	O
Kicker	B-Language
,	O
KDesktop	B-Language
,	O
and	O
SuperKaramba	B-Language
by	O
integrating	O
their	O
functionality	O
into	O
one	O
piece	O
of	O
technology	O
;	O
Plasma	B-Language
is	O
intended	O
to	O
be	O
more	O
configurable	O
for	O
those	O
wanting	O
to	O
update	O
the	O
decades-old	O
desktop	B-Application
metaphor	I-Application
.	O
</s>
<s>
There	O
are	O
a	O
number	O
of	O
new	O
frameworks	B-Architecture
,	O
including	O
Phonon	B-Language
(	O
a	O
new	O
multimedia	O
interface	O
making	O
KDE	B-Application
independent	O
of	O
any	O
one	O
specific	O
media	O
backend	O
)	O
Solid	B-Language
(	O
an	O
API	B-Application
for	O
network	O
and	O
portable	O
devices	O
)	O
,	O
and	O
Decibel	O
(	O
a	O
new	O
communication	O
framework	O
to	O
integrate	O
all	O
communication	O
protocols	O
into	O
the	O
desktop	O
)	O
.	O
</s>
<s>
Also	O
featured	O
is	O
a	O
metadata	O
and	O
search	O
framework	O
,	O
incorporating	O
Strigi	B-Language
as	O
a	O
full-text	O
file	O
indexing	O
service	O
,	O
and	O
NEPOMUK	B-Language
with	O
KDE	B-Application
integration	O
.	O
</s>
<s>
Starting	O
with	O
Qt	B-Language
4.5	O
,	O
Qt	B-Language
was	O
also	O
made	O
available	O
under	O
the	O
LGPL	B-Application
version	O
2.1	O
,	O
a	O
major	O
step	O
for	O
KDE	B-Application
adoption	O
in	O
corporate	O
and	O
proprietary	B-Application
environments	O
,	O
as	O
the	O
LGPL	B-Application
permits	O
proprietary	B-Application
applications	B-Application
to	O
link	O
to	O
libraries	B-Library
licensed	O
under	O
the	O
LGPL	B-Application
.	O
</s>
<s>
As	O
of	O
August	O
2014	O
,	O
KDE	B-Application
no	O
longer	O
provides	O
synchronized	O
releases	O
of	O
the	O
entire	O
software	O
compilation	O
;	O
instead	O
the	O
software	O
is	O
split	O
into	O
three	O
parts	O
:	O
</s>
<s>
KDE	B-Language
Applications	I-Language
,	O
a	O
bundle	O
of	O
applications	B-Application
and	O
supporting	O
libraries	B-Library
(	O
14.12	O
was	O
the	O
first	O
version	O
incorporating	O
Frameworks	B-Language
5	I-Language
based	O
applications	B-Application
,	O
and	O
introduced	O
date-based	O
version	O
numbers	O
)	O
.	O
</s>
<s>
Major	O
changes	O
include	O
a	O
move	O
from	O
Qt	B-Language
4	O
to	O
Qt	B-Language
5	O
,	O
support	O
for	O
the	O
next-generation	O
display	O
server	O
protocol	O
Wayland	B-Language
,	O
support	O
for	O
the	O
next-generation	O
rendering	O
API	B-Application
Vulkan	B-Application
and	O
modularization	O
of	O
the	O
KDE	B-Application
core	O
libraries	B-Library
.	O
</s>
<s>
Initial	O
releases	O
of	O
Frameworks	B-Language
5	I-Language
and	O
Plasma	B-Language
5	I-Language
were	O
made	O
available	O
in	O
July	O
2014	O
.	O
</s>
<s>
KDE	B-Language
SC	I-Language
releases	O
are	O
made	O
to	O
the	O
KDE	B-Application
FTP	B-Protocol
server	I-Protocol
in	O
the	O
form	O
of	O
source	O
code	O
with	O
configure	B-Device
scripts	I-Device
,	O
which	O
are	O
compiled	O
by	O
operating	O
system	O
vendors	O
and	O
integrated	O
with	O
the	O
rest	O
of	O
their	O
systems	O
before	O
distribution	O
.	O
</s>
<s>
Most	O
vendors	O
use	O
only	O
stable	O
and	O
tested	O
versions	O
of	O
KDE	B-Language
SC	I-Language
,	O
providing	O
it	O
in	O
the	O
form	O
of	O
easily	O
installable	O
,	O
pre-compiled	O
packages	O
.	O
</s>
<s>
The	O
source	O
code	O
of	O
every	O
stable	O
and	O
development	O
version	O
of	O
KDE	B-Language
SC	I-Language
is	O
stored	O
in	O
the	O
KDE	B-Application
source	O
code	O
repository	O
,	O
using	O
Git	B-Application
.	O
</s>
<s>
KDE	B-Language
Platform	I-Language
is	O
licensed	O
under	O
the	O
LGPL	B-Application
,	O
BSD	B-Operating_System
license	I-Operating_System
,	O
MIT	B-License
license	I-License
,	O
or	O
X11	B-License
license	I-License
.	O
</s>
<s>
Applications	B-Application
also	O
allow	O
GPL	B-License
.	O
</s>
<s>
Documentation	O
also	O
allow	O
FDL	B-Application
.	O
</s>
<s>
CMake	B-Language
modules	O
must	O
be	O
licensed	O
under	O
the	O
BSD	B-Operating_System
licence	I-Operating_System
.	O
</s>
<s>
Major	O
releases	O
are	O
releases	O
that	O
begin	O
a	O
series	O
(	O
version	O
number	O
X.0	O
)	O
.	O
</s>
<s>
These	O
releases	O
are	O
allowed	O
to	O
break	O
binary	B-General_Concept
compatibility	I-General_Concept
with	O
the	O
predecessor	O
,	O
or	O
to	O
put	O
it	O
differently	O
,	O
all	O
following	O
releases	O
(	O
X.1	O
,	O
X.2	O
,	O
...	O
)	O
will	O
guarantee	O
binary	O
portability	O
(	O
API	B-Application
&	O
ABI	B-Operating_System
)	O
.	O
</s>
<s>
This	O
means	O
,	O
for	O
instance	O
,	O
that	O
software	O
that	O
was	O
developed	O
for	O
KDE3.0	O
will	O
work	O
on	O
all	O
(	O
future	O
)	O
KDE3	B-Language
releases	O
;	O
however	O
,	O
an	O
application	O
developed	O
for	O
KDE2	B-Language
is	O
not	O
guaranteed	O
to	O
be	O
able	O
to	O
make	O
use	O
of	O
the	O
KDE3	B-Language
libraries	B-Library
.	O
</s>
<s>
KDE	B-Application
major	O
version	O
numbers	O
follow	O
the	O
Qt	B-Language
release	O
cycle	O
,	O
meaning	O
that	O
KDE	B-Language
SC	I-Language
4	I-Language
is	O
based	O
on	O
Qt4	B-Language
,	O
while	O
KDE3	B-Language
was	O
based	O
on	O
Qt3	O
.	O
</s>
<s>
Qt	B-Language
5.0	O
was	O
released	O
19	O
December	O
2012	O
,	O
Qt	B-Language
5.2	O
12	O
December	O
2013	O
.	O
</s>
<s>
And	O
for	O
example	O
KDE	O
Frameworks	O
5.21.0	O
requires	O
Qt	B-Language
>=	O
5.4	O
,	O
and	O
no	O
longer	O
supports	O
Qt	B-Language
5.3	O
(	O
cf	O
.	O
</s>
<s>
Qt	B-Language
version	I-Language
history	I-Language
)	O
.	O
</s>
<s>
There	O
are	O
two	O
main	O
types	O
of	O
standard	O
releases	O
:	O
Feature	O
releases	O
and	O
bugfix	B-General_Concept
releases	I-General_Concept
.	O
</s>
<s>
A	O
feature	O
release	O
needs	O
several	O
months	O
to	O
be	O
finished	O
and	O
many	O
bugs	O
that	O
are	O
fixed	O
during	O
this	O
time	O
are	O
backported	O
to	O
the	O
stable	O
branch	O
,	O
meaning	O
that	O
these	O
fixes	O
are	O
incorporated	O
into	O
the	O
last	O
stable	O
release	O
by	O
bugfix	B-General_Concept
releases	I-General_Concept
.	O
</s>
<s>
During	O
the	O
KDE	B-Language
SC	I-Language
4	I-Language
series	O
,	O
KDE	B-Language
SC	I-Language
had	O
a	O
feature	O
release	O
roughly	O
every	O
six	O
months	O
.	O
</s>
<s>
Since	O
the	O
split	O
,	O
KDE	B-Language
Plasma	I-Language
releases	O
a	O
new	O
feature	O
version	O
roughly	O
every	O
3	O
–	O
4	O
months	O
.	O
</s>
<s>
Bugfix	B-General_Concept
releases	I-General_Concept
have	O
three	O
version	O
numbers	O
,	O
e.g.	O
</s>
<s>
Bugfix	B-General_Concept
releases	I-General_Concept
in	O
general	O
do	O
not	O
allow	O
new	O
features	O
,	O
although	O
some	O
releases	O
include	O
small	O
enhancements	O
.	O
</s>
<s>
Starting	O
with	O
the	O
KDE	B-Language
SC	I-Language
4	I-Language
series	O
,	O
KDE	B-Language
SC	I-Language
has	O
a	O
maintenance	B-General_Concept
release	I-General_Concept
roughly	O
every	O
month	O
,	O
except	O
during	O
the	O
month	O
of	O
a	O
feature	O
release	O
,	O
while	O
with	O
Plasma	B-Language
5	I-Language
,	O
bugfix	B-General_Concept
releases	I-General_Concept
tend	O
to	O
happen	O
even	O
shorter	O
like	O
2	O
–	O
3	O
weeks	O
.	O
</s>
<s>
The	O
KDE	B-Application
team	O
releases	O
new	O
versions	O
on	O
a	O
regular	O
basis	O
.	O
</s>
<s>
KDE	B-Language
1.0	I-Language
had	O
LoC	O
.	O
</s>
<s>
Most	O
KDE	B-Application
software	O
uses	O
Qt	B-Language
which	O
runs	O
on	O
most	O
Unix	B-Application
and	O
Unix-like	B-Operating_System
systems	I-Operating_System
(	O
including	O
Mac	B-Application
OS	I-Application
X	I-Application
)	O
,	O
Android	O
and	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
CMake	B-Language
serves	O
as	O
the	O
build	O
tool	O
.	O
</s>
<s>
This	O
allows	O
KDE	B-Application
to	O
support	O
a	O
wider	O
range	O
of	O
platforms	O
,	O
including	O
Windows	B-Application
.	O
</s>
<s>
GNU	B-Application
gettext	I-Application
is	O
used	O
for	O
translation	O
.	O
</s>
<s>
Doxygen	B-Language
is	O
used	O
to	O
generate	O
api	B-Application
documentation	I-Application
.	O
</s>
<s>
KDE	B-Language
Software	I-Language
Compilation	I-Language
:	O
KDE	B-Language
Software	I-Language
Compilation	I-Language
(	O
KDE	B-Language
SC	I-Language
)	O
is	O
the	O
coordinated	O
releases	O
of	O
new	O
software	O
versions	O
,	O
gathering	O
elements	O
from	O
the	O
previous	O
components	O
to	O
build	O
an	O
integrated	O
core	O
of	O
software	O
.	O
</s>
<s>
The	O
KDE	B-Language
SC	I-Language
is	O
not	O
a	O
product	O
as	O
a	O
single	O
entity	O
.	O
</s>
<s>
Calligra	B-Application
Suite	I-Application
:	O
Integrated	O
office	O
suite	O
.	O
</s>
<s>
KDE-Extragear	O
:	O
Extragear	O
is	O
a	O
collection	O
of	O
applications	B-Application
associated	O
with	O
KDE	B-Application
.	O
</s>
<s>
Those	O
applications	B-Application
are	O
not	O
part	O
the	O
official	O
software	O
compilation	O
,	O
but	O
they	O
are	O
still	O
part	O
of	O
the	O
project	O
.	O
</s>
<s>
KDE-Playground	O
:	O
This	O
package	O
contains	O
pre-release	O
and	O
unstable	O
software	O
.	O
</s>
<s>
It	O
is	O
a	O
place	O
for	O
applications	B-Application
to	O
mature	O
.	O
</s>
<s>
KDE-Libs	B-Language
:	O
A	O
collection	O
of	O
libraries	B-Library
that	O
provides	O
frameworks	B-Architecture
and	O
functionality	O
for	O
developers	B-Application
.	O
</s>
<s>
KDE-Base	B-Language
:	O
The	O
base	O
set	O
of	O
files	O
,	O
libraries	B-Library
and	O
programs	O
needed	O
by	O
the	O
Software	O
Compilation	O
.	O
</s>
<s>
KDE-Base	B-Language
is	O
divided	O
into	O
three	O
parts	O
:	O
</s>
<s>
Applications	B-Application
:	O
Containing	O
the	O
applications	B-Application
that	O
form	O
the	O
KDE	B-Language
desktop	I-Language
,	O
like	O
Konqueror	B-Application
,	O
Dolphin	B-Application
,	O
KWrite	B-Language
,	O
and	O
Konsole	B-Language
.	O
</s>
<s>
Runtime	O
:	O
Applications	B-Application
required	O
by	O
KDE	B-Application
apps	O
to	O
function	O
properly	O
at	O
runtime	O
.	O
</s>
<s>
KDE-Plasma-Addons	O
:	O
Additional	O
Plasma	B-Language
widgets	O
.	O
</s>
<s>
KDE-Accessibility	O
:	O
Accessibility	O
applications	B-Application
.	O
</s>
<s>
Major	O
applications	B-Application
by	O
KDE	B-Language
Software	I-Language
Compilation	I-Language
include	O
:	O
</s>
<s>
Kontact	B-Language
–	O
Personal	B-Application
information	I-Application
manager	I-Application
featuring	O
an	O
e-mail	B-Protocol
client	I-Protocol
,	O
a	O
news	B-Protocol
client	I-Protocol
,	O
a	O
feed	B-Application
aggregator	I-Application
,	O
to-do	O
lists	O
,	O
etc	O
.	O
</s>
<s>
KRDC	B-Language
–	O
a	O
remote	B-Protocol
desktop	I-Protocol
client	B-Protocol
.	O
</s>
<s>
Both	O
the	O
Virtual	B-Protocol
Network	I-Protocol
Computing	I-Protocol
(	O
VNC	B-Protocol
)	O
and	O
Remote	B-Protocol
Desktop	I-Protocol
Protocol	I-Protocol
(	O
RDP	O
)	O
protocols	O
are	O
supported	O
,	O
so	O
Unix-like	B-Operating_System
and	O
Windows	B-Application
PC	I-Application
can	O
be	O
accessed	O
using	O
this	O
software	O
.	O
</s>
<s>
As	O
part	O
of	O
the	O
GSoC	O
,	O
project	O
developers	B-Application
helped	O
make	O
Libvncserver	B-Language
compile	O
on	O
Windows	B-Application
platforms	O
,	O
allowing	O
for	O
a	O
port	O
to	O
Windows	B-Application
.	O
</s>
<s>
In	O
November	O
1998	O
,	O
the	O
Qt	B-Language
framework	I-Language
was	O
dual-licensed	O
under	O
the	O
free	B-License
and	I-License
open-source	I-License
Q	B-Language
Public	I-Language
License	I-Language
(	O
QPL	B-Language
)	O
and	O
a	O
commercial	O
license	O
for	O
proprietary	B-Application
software	I-Application
developers	B-Application
.	O
</s>
<s>
The	O
same	O
year	O
,	O
the	O
KDE	B-Application
Free	O
Qt	B-Language
foundation	O
was	O
created	O
which	O
guarantees	O
that	O
Qt	B-Language
would	O
fall	O
under	O
a	O
variant	O
of	O
the	O
very	O
liberal	O
BSD	B-Operating_System
license	I-Operating_System
should	O
Trolltech	O
cease	O
to	O
exist	O
or	O
no	O
free	O
version	O
of	O
Qt	B-Language
be	O
released	O
during	O
12	O
months	O
.	O
</s>
<s>
Debate	O
continued	O
about	O
compatibility	O
with	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
,	O
hence	O
in	O
September	O
2000	O
Trolltech	O
made	O
the	O
Unix	B-Application
version	O
of	O
the	O
Qt	B-Language
libraries	I-Language
available	O
under	O
the	O
GPL	B-License
in	O
addition	O
to	O
the	O
QPL	B-Language
which	O
eliminated	O
the	O
concerns	O
of	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
.	O
</s>
<s>
Trolltech	O
continued	O
to	O
require	O
licenses	O
for	O
developing	O
proprietary	B-Application
software	I-Application
with	O
Qt	B-Language
.	O
</s>
<s>
The	O
core	O
libraries	B-Library
of	O
KDE	B-Application
are	O
collectively	O
licensed	O
under	O
the	O
GNU	B-Application
LGPL	I-Application
but	O
the	O
only	O
way	O
for	O
proprietary	B-Application
software	I-Application
to	O
make	O
use	O
of	O
them	O
was	O
to	O
be	O
developed	O
under	O
the	O
terms	O
of	O
the	O
Qt	B-Language
proprietary	B-Application
license	I-Application
.	O
</s>
<s>
Starting	O
with	O
Qt	B-Language
4.5	O
,	O
Qt	B-Language
was	O
also	O
made	O
available	O
under	O
the	O
LGPL	B-Application
version	O
2.1	O
,	O
now	O
allowing	O
proprietary	B-Application
applications	B-Application
to	O
legally	O
use	O
the	O
open	O
source	O
Qt	B-Language
version	O
.	O
</s>
