<s>
Kontact	B-Language
is	O
a	O
personal	B-Application
information	I-Application
manager	I-Application
and	O
groupware	B-Application
software	O
suite	O
developed	O
by	O
KDE	B-Application
.	O
</s>
<s>
Technically	O
speaking	O
,	O
Kontact	B-Language
only	O
refers	O
to	O
a	O
small	O
umbrella	O
application	O
that	O
unifies	O
different	O
stand-alone	O
applications	O
under	O
one	O
user	O
interface	O
.	O
</s>
<s>
KDE	B-Application
PIM	O
refers	O
to	O
a	O
work	O
group	O
within	O
the	O
larger	O
KDE	B-Application
project	O
that	O
develops	O
the	O
individual	O
applications	O
in	O
a	O
coordinated	O
way	O
.	O
</s>
<s>
In	O
popular	O
terms	O
,	O
however	O
,	O
Kontact	B-Language
often	O
refers	O
to	O
the	O
whole	O
set	O
of	O
KDE	B-Application
PIM	O
applications	O
.	O
</s>
<s>
These	O
days	O
many	O
popular	O
Linux	B-Application
distributions	I-Application
such	O
as	O
Kubuntu	B-Application
hide	O
the	O
individual	O
applications	O
and	O
only	O
place	O
Kontact	B-Language
prominently	O
.	O
</s>
<s>
The	O
initial	O
groupware	B-Application
container	O
application	O
was	O
written	O
in	O
an	O
afternoon	O
by	O
Matthias	O
Hölzer-Klüpfel	O
and	O
later	O
imported	O
into	O
the	O
KDE	B-Application
source	O
repository	O
and	O
maintained	O
by	O
Daniel	O
Molkentin	O
.	O
</s>
<s>
This	O
container	O
application	O
is	O
essential	O
for	O
Kontact	B-Language
to	O
operate	O
,	O
but	O
without	O
embedded	O
components	O
it	O
is	O
not	O
useful	O
by	O
itself	O
.	O
</s>
<s>
He	O
modified	O
the	O
KAddressBook	O
and	O
KOrganizer	O
applications	O
to	O
create	O
the	O
initial	O
address	B-Operating_System
book	I-Operating_System
and	O
organizer	O
components	O
.	O
</s>
<s>
At	O
this	O
stage	O
no	O
mail	O
client	O
component	O
existed	O
,	O
so	O
KDE	B-Application
still	O
lacked	O
a	O
functional	O
integrated	O
groupware	B-Application
application	O
.	O
</s>
<s>
He	O
then	O
integrated	O
the	O
mail	O
client	O
component	O
with	O
the	O
other	O
components	O
,	O
and	O
the	O
groupware	B-Application
container	O
application	O
,	O
assembled	O
and	O
released	O
the	O
initial	O
Kontact	B-Language
packages	O
,	O
and	O
created	O
the	O
initial	O
Kontact	B-Language
website	O
.	O
</s>
<s>
Daniel	O
Molkentin	O
,	O
Cornelius	O
Schumacher	O
and	O
Don	O
Sanders	O
then	O
formed	O
the	O
core	O
Kontact	B-Language
team	O
.	O
</s>
<s>
The	O
KMail	O
and	O
container	O
application	O
changes	O
were	O
imported	O
into	O
the	O
KDE	B-Application
source	O
repository	O
,	O
and	O
Kontact	B-Language
was	O
released	O
as	O
part	O
of	O
KDE	B-Application
3.2	O
.	O
</s>
<s>
During	O
the	O
construction	O
of	O
the	O
Kontact	B-Language
application	O
suite	O
,	O
the	O
Kolab	B-Language
groupware	B-Application
server	O
was	O
being	O
worked	O
on	O
by	O
Erfrakon	O
,	O
Intevation.net	O
and	O
Klarälvdalens	O
Datakonsult	O
simultaneously	O
and	O
was	O
completed	O
at	O
approximately	O
the	O
same	O
time	O
.	O
</s>
<s>
This	O
work	O
was	O
done	O
as	O
part	O
of	O
the	O
Kroupware	O
project	O
that	O
also	O
involved	O
modifying	O
the	O
KMail	O
and	O
KOrganizer	O
applications	O
to	O
enhance	O
them	O
with	O
additional	O
groupware	B-Application
features	O
.	O
</s>
<s>
The	O
core	O
Kontact	B-Language
team	O
,	O
the	O
Kolab	B-Language
consortium	O
,	O
and	O
several	O
independent	O
KDE	B-Application
PIM	O
developers	O
then	O
worked	O
together	O
to	O
enhance	O
Kontact	B-Language
by	O
integrating	O
the	O
Kroupware	O
functionality	O
and	O
making	O
Kolab	B-Language
the	O
primary	O
Kontact	B-Language
server	O
.	O
</s>
<s>
the	O
KNode	O
application	O
by	O
KDE	B-Application
developer	O
Zack	O
Rusin	O
,	O
and	O
Kontact	B-Language
was	O
modified	O
to	O
support	O
an	O
array	O
of	O
mainly	O
web	O
based	O
suites	O
of	O
collaboration	B-Application
software	I-Application
.	O
</s>
<s>
KMail	O
supports	O
folders	O
,	O
filtering	O
,	O
viewing	O
HTML	B-Language
mail	O
,	O
and	O
international	O
character	O
sets	O
.	O
</s>
<s>
It	O
can	O
handle	O
IMAP	B-Protocol
,	O
IMAP	B-Protocol
IDLE	I-Protocol
,	O
dIMAP	B-Protocol
,	O
POP3	B-Protocol
,	O
and	O
local	O
mailboxes	O
for	O
incoming	O
mail	O
.	O
</s>
<s>
It	O
can	O
send	O
mail	O
via	O
SMTP	B-Protocol
or	O
sendmail	B-Application
protocols	O
.	O
</s>
<s>
It	O
can	O
forward	O
HTML	B-Language
mail	O
as	O
an	O
attachment	O
but	O
it	O
cannot	O
forward	O
mail	O
inline	O
.	O
</s>
<s>
This	O
allows	O
the	O
use	O
of	O
systems	O
such	O
as	O
SpamAssassin	B-Language
which	O
can	O
add	O
their	O
own	O
headers	O
to	O
a	O
piece	O
of	O
e-mail	O
.	O
</s>
<s>
These	O
modular	O
filters	O
can	O
be	O
combined	O
with	O
text	O
filters	O
to	O
detect	O
(	O
for	O
example	O
)	O
e-mail	O
which	O
has	O
been	O
flagged	O
by	O
SpamAssassin	B-Language
by	O
looking	O
for	O
the	O
special	O
headers	O
it	O
added	O
.	O
</s>
<s>
KMail	O
depends	O
on	O
the	O
GnuPG	B-Application
software	O
for	O
this	O
functionality	O
.	O
</s>
<s>
KMail	O
also	O
supports	O
S/MIME	B-Protocol
messages	O
as	O
well	O
as	O
Chiasmus	O
,	O
a	O
proprietary	O
cryptographic	O
system	O
created	O
by	O
the	O
German	O
Federal	O
Office	O
for	O
Information	O
Security	O
(	O
BSI	O
)	O
.	O
</s>
<s>
KAddressBook	O
is	O
an	O
address	B-Operating_System
book	I-Operating_System
application	O
.	O
</s>
<s>
KAddressBook	O
is	O
a	O
graphical	B-Application
interface	I-Application
to	O
organizing	O
the	O
addresses	O
and	O
contact	O
information	O
of	O
family	O
,	O
friends	O
,	O
business	O
partners	O
,	O
etc	O
.	O
</s>
<s>
It	O
integrates	O
with	O
KDE	B-Language
Plasma	I-Language
,	O
allowing	O
interoperability	O
with	O
other	O
KDE	B-Application
programs	O
,	O
including	O
the	O
e-mail	O
client	O
KMail	O
–	O
allowing	O
one-click	O
access	O
to	O
composing	O
an	O
e-mail	O
–	O
and	O
the	O
instant	O
messenger	O
Kopete	B-Language
–	O
showing	O
the	O
online	O
status	O
of	O
and	O
easy	O
access	O
to	O
instant	O
messaging	O
contacts	O
.	O
</s>
<s>
Uses	O
DBUS	B-Language
to	O
interface	O
with	O
other	O
applications	O
.	O
</s>
<s>
Interoperable	O
with	O
KMail	O
and	O
Kopete	B-Language
,	O
as	O
well	O
as	O
Kontact	B-Language
.	O
</s>
<s>
Capability	O
to	O
query	O
an	O
LDAP	B-Protocol
database	O
containing	O
person	O
information	O
.	O
</s>
<s>
Akregator	O
is	O
a	O
feed	B-Application
aggregator	I-Application
.	O
</s>
<s>
It	O
supports	O
both	O
RSS	O
and	O
Atom	B-Application
.	O
</s>
<s>
It	O
has	O
an	O
incremental	B-Application
search	I-Application
feature	O
for	O
the	O
titles	O
of	O
all	O
the	O
entries	O
in	O
its	O
database	O
.	O
</s>
<s>
It	O
supports	O
feed	O
icons	O
and	O
embeds	O
KHTML	B-Language
as	O
an	O
internal	O
,	O
tabbed	O
web	B-Application
browser	I-Application
.	O
</s>
<s>
Any	O
external	O
browser	B-Application
can	O
also	O
be	O
called	O
.	O
</s>
<s>
Akregator	O
is	O
part	O
of	O
KDE	B-Application
since	O
the	O
3.4	O
release	O
,	O
and	O
it	O
is	O
distributed	O
with	O
the	O
kdepim	B-Language
module	O
.	O
</s>
<s>
KNode	O
is	O
the	O
news	B-Protocol
client	I-Protocol
program	O
for	O
the	O
KDE	B-Application
desktop	O
environment	O
.	O
</s>
<s>
It	O
supports	O
multiple	O
NNTP	B-Protocol
servers	O
,	O
message	O
threads	O
,	O
scoring	O
,	O
X-Face	B-Application
headers	O
(	O
reading	O
and	O
posting	O
)	O
,	O
and	O
international	O
character	O
sets	O
.	O
</s>
<s>
KJots	O
is	O
a	O
simple	O
outliner	B-Application
text	B-Application
editor	I-Application
which	O
can	O
be	O
used	O
to	O
create	O
a	O
personal	B-Protocol
wiki	I-Protocol
.	O
</s>
<s>
It	O
uses	O
a	O
basic	O
tree	B-Application
structure	I-Application
to	O
organize	O
information	O
:	O
it	O
refers	O
to	O
nodes	O
as	O
‘	O
books’	O
and	O
leaves	O
as	O
‘	O
pages’	O
.	O
</s>
<s>
Similar	O
wiki-style	O
programs	O
are	O
Zim	B-Application
(	O
based	O
on	O
GTK	B-Application
and	O
Python	B-Language
)	O
,	O
Wixi	O
(	O
based	O
on	O
Python	B-Language
and	O
GTK	B-Application
)	O
,	O
(	O
based	O
on	O
Python	B-Language
and	O
GTK	B-Application
)	O
,	O
Notecase	O
(	O
based	O
on	O
GTK	B-Application
)	O
,	O
BasKet	B-Application
(	O
based	O
on	O
Qt	B-Language
)	O
,	O
Gnudiary	O
(	O
also	O
based	O
on	O
Qt	B-Language
)	O
,	O
Tomboy	B-Language
(	O
GTK	B-Application
,	O
based	O
on	O
Mono	B-Application
)	O
,	O
Gnote	B-Language
(	O
Tomboy	B-Language
port	O
to	O
C++	B-Language
)	O
and	O
Tiddlywiki	B-Language
(	O
self-modifying	O
,	O
single-HTML	O
contained	O
personal	B-Protocol
wiki	I-Protocol
,	O
written	O
in	O
JavaScript	B-Language
and	O
expandable	O
with	O
plugins	O
)	O
.	O
</s>
<s>
Also	O
Treeline	B-Application
,	O
an	O
advanced	O
outliner	B-Application
written	O
in	O
Python	B-Language
and	O
personal	O
database	O
available	O
for	O
Linux	B-Application
and	O
Microsoft	B-Application
Windows	I-Application
,	O
has	O
similar	O
functions	O
.	O
</s>
<s>
Along	O
with	O
the	O
KDE	B-Language
Software	I-Language
Compilation	I-Language
4	I-Language
life	O
cycle	O
,	O
Kontact	B-Language
moved	O
to	O
Akonadi	B-Language
for	O
storing	O
its	O
data	O
,	O
when	O
in	O
the	O
past	O
every	O
Kontact	B-Language
component	O
implemented	O
the	O
storage	O
technologies	O
itself	O
.	O
</s>
<s>
Akonadi	B-Language
is	O
currently	O
mostly	O
developed	O
by	O
the	O
KDE	B-Application
PIM	O
team	O
,	O
but	O
its	O
design	O
is	O
done	O
in	O
an	O
agnostic	O
way	O
and	O
thus	O
not	O
depending	O
on	O
KDE	B-Application
technologies	O
.	O
</s>
<s>
The	O
first	O
SC	O
4	O
release	O
of	O
Kontact	B-Language
was	O
officially	O
shipped	O
with	O
KDE	O
4.1	O
.	O
</s>
<s>
That	O
release	O
did	O
not	O
use	O
Akonadi	B-Language
.	O
</s>
<s>
Since	O
then	O
the	O
Kontact	B-Language
components	O
have	O
been	O
gradually	O
migrating	O
towards	O
Akonadi	B-Language
.	O
</s>
<s>
The	O
first	O
stable	O
version	O
of	O
KDE	B-Application
PIM	O
using	O
Akonadi	B-Language
was	O
released	O
together	O
with	O
KDE	B-Application
4.6.4	O
in	O
June	O
2011	O
.	O
</s>
