<s>
Zammad	B-Protocol
is	O
a	O
free	B-Application
helpdesk	B-Application
or	O
issue	B-Application
tracking	I-Application
system	I-Application
.	O
</s>
<s>
It	O
offers	O
the	O
connection	O
of	O
various	O
channels	O
like	O
email	O
,	O
chat	B-Protocol
,	O
telephone	O
,	O
Twitter	B-Application
,	O
or	O
Facebook	B-Application
.	I-Application
</s>
<s>
Zammad	B-Protocol
is	O
developed	O
in	O
the	O
programming	O
languages	O
Ruby	B-Language
and	O
JavaScript	B-Language
.	O
</s>
<s>
The	O
name	O
Zammad	B-Protocol
comes	O
from	O
the	O
Bavarian	O
language	O
and	O
means	O
"	O
together	O
"	O
.	O
</s>
<s>
Zammad	B-Protocol
was	O
founded	O
by	O
Martin	O
Edenhofer	O
,	O
who	O
was	O
formerly	O
involved	O
in	O
the	O
development	O
of	O
OTRS	B-Language
.	O
</s>
<s>
The	O
source	O
code	O
is	O
free	B-Application
software	I-Application
according	O
to	O
the	O
AGPL-3.0-only	B-Application
license	O
and	O
available	O
via	O
git	O
.	O
</s>
<s>
For	O
this	O
purpose	O
,	O
the	O
Zammad	B-Protocol
Foundation	O
was	O
founded	O
to	O
ensure	O
the	O
freedom	O
of	O
the	O
software	O
.	O
</s>
<s>
Inspiration	O
for	O
the	O
Zammad	B-Protocol
Foundation	O
are	O
the	B-Application
WordPress	I-Application
Foundation	I-Application
,	O
the	B-Operating_System
Free	I-Operating_System
Software	I-Operating_System
Foundation	I-Operating_System
,	O
and	O
the	B-Operating_System
Mozilla	I-Operating_System
Foundation	I-Operating_System
.	O
</s>
<s>
Technologically	O
,	O
the	O
user	O
interface	O
is	O
implemented	O
as	O
a	O
web	B-Application
application	I-Application
with	O
CSS	B-Language
,	O
JavaScript	B-Language
,	O
and	O
HTML5	B-Application
(	O
including	O
WebSockets	B-Protocol
)	O
,	O
which	O
means	O
that	O
the	O
application	O
runs	O
in	O
the	O
browser	O
–	O
only	O
data	O
is	O
exchanged	O
over	O
the	O
network	O
(	O
in	O
REST	B-Protocol
)	O
.	O
</s>
<s>
Thus	O
the	O
WebApp	B-Application
feels	O
like	O
a	O
native	O
application	O
and	O
is	O
capable	O
of	O
real-time	O
(	O
information	O
is	O
updated	O
in	O
all	O
clients	O
immediately	O
after	O
creation/change	O
without	O
reloading	O
the	O
application/web	O
page	O
)	O
.	O
</s>
<s>
In	O
version	O
3.0	O
Zammad	B-Protocol
was	O
extended	O
by	O
a	O
knowledge	O
base	O
.	O
</s>
<s>
The	O
backend	O
is	O
realized	O
in	O
Ruby	B-Application
on	I-Application
Rails	I-Application
and	O
communicates	O
with	O
the	O
user	O
interface	O
via	O
REST	B-Protocol
.	O
</s>
<s>
Zammad	B-Protocol
relies	O
on	O
Elasticsearch	B-Application
to	O
speed	O
up	O
search	O
queries	O
.	O
</s>
<s>
MySQL	B-Application
,	O
MariaDB	B-Application
,	O
or	O
PostgreSQL	B-Application
are	O
supported	O
as	O
database	B-Application
servers	I-Application
.	O
</s>
<s>
Nginx	B-Operating_System
or	O
Apache	B-Application
can	O
be	O
used	O
as	O
a	O
web	B-Application
server	I-Application
or	O
reverse	B-General_Concept
proxy	I-General_Concept
.	O
</s>
