<s>
Konsole	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
terminal	B-Application
emulator	I-Application
graphical	O
application	O
which	O
is	O
part	O
of	O
KDE	B-Language
Applications	I-Language
and	O
ships	O
with	O
the	O
KDE	B-Application
desktop	O
environment	O
.	O
</s>
<s>
Konsole	B-Language
was	O
originally	O
written	O
by	O
Lars	O
Doelle	O
.	O
</s>
<s>
It	O
ls	O
licensed	O
under	O
the	O
GPL-2.0-or-later	B-License
and	O
the	O
GNU	B-Application
Free	I-Application
Documentation	I-Application
License	I-Application
.	O
</s>
<s>
KDE	B-Language
applications	I-Language
,	O
including	O
Dolphin	B-Application
,	O
Kate	B-Application
,	O
KDevelop	B-Language
,	O
Kile	B-Language
,	O
Konversation	B-Language
,	O
Konqueror	B-Application
,	O
and	O
Krusader	B-Language
,	O
use	O
Konsole	B-Language
to	O
provide	O
embedded	O
terminal	O
functionality	O
via	O
Kpart	B-Language
.	O
</s>
<s>
Up	O
to	O
the	O
KDE	B-Application
4.0	O
,	O
Konsole	B-Language
internal	O
functionality	O
was	O
split	O
into	O
a	O
backend	O
and	O
frontend	O
parts	O
.	O
</s>
<s>
The	O
backed	O
was	O
represented	O
by	O
a	O
terminal	B-Application
emulator	I-Application
(	O
the	O
DEC	B-Device
VT102	I-Device
+	O
xterm	B-Language
emulation	O
program	O
)	O
and	O
the	O
frontend	O
that	O
included	O
terminal	O
display	O
and	O
user	O
interface	O
used	O
to	O
display	O
output	O
characters	O
on	O
a	O
window	O
screen	O
or	O
a	O
printer	O
.	O
</s>
<s>
With	O
newer	O
versions	O
Konsole	B-Language
on	O
Linux	O
systems	O
uses	O
PTY	O
(	O
pseudoterminal	O
interface	O
)	O
abstraction	O
implemented	O
by	O
KPty	O
KDE	B-Language
framework	I-Language
introduced	O
in	O
2014	O
.	O
</s>
