<s>
Contao	B-Language
(	O
formerly	O
TYPOlight	O
)	O
is	O
a	O
free	B-Application
content	B-Protocol
management	I-Protocol
system	I-Protocol
(	O
CMS	B-Protocol
)	O
for	O
medium	O
to	O
large	O
websites	O
.	O
</s>
<s>
for	O
developers	O
)	O
and	O
front-office	O
(	O
i.e.	O
,	O
for	O
users	O
)	O
accessibility	O
,	O
and	O
observes	O
XHTML	B-Language
,	O
HTML5	B-Application
and	O
CSS	B-Language
standards	O
,	O
according	O
to	O
W3C/WAI	O
guidelines	O
,	O
to	O
generate	O
pages	O
.	O
</s>
<s>
The	O
program	O
is	O
an	O
open-source	B-Application
project	I-Application
,	O
published	O
in	O
its	O
original	O
form	O
in	O
2006	O
by	O
Leo	O
Feyer	O
.	O
</s>
<s>
As	O
of	O
4.4	O
,	O
Contao	B-Language
requires	O
an	O
Apache	B-Application
,	O
Nginx	B-Operating_System
or	O
IIS	B-Application
web	O
server	O
,	O
PHP	B-Application
(	O
version	O
5.6.0	O
or	O
greater	O
)	O
,	O
the	O
MySQL	B-Application
or	O
MariaDB	B-Application
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
(	O
version	O
5.1	O
or	O
greater	O
)	O
and	O
the	O
PHP	B-Application
extension	I-Application
GDLib	B-Language
(	O
to	O
allow	O
image	B-Algorithm
resizing	I-Algorithm
)	O
and	O
SOAP	B-Application
(	O
access	O
to	O
the	O
extension	O
repository	O
)	O
.	O
</s>
<s>
Contao	B-Language
runs	O
successfully	O
with	O
current	O
versions	O
of	O
major	O
browsers	O
like	O
Firefox	B-Application
,	O
Chrome	B-Application
and	O
Internet	B-Application
Explorer	I-Application
(	O
from	O
version	O
8	O
on	O
)	O
.	O
</s>
<s>
RC1	O
on	O
June	O
6	O
,	O
2010	O
,	O
the	O
TYPOlight	O
product	O
was	O
renamed	O
Contao	B-Language
.	O
</s>
<s>
Developer	O
Leo	O
Feyer	O
justified	O
the	O
change	O
on	O
the	O
grounds	O
that	O
TYPOlight	O
had	O
often	O
been	O
confused	O
with	O
TYPO3	B-Protocol
,	O
a	O
different	O
CMS	B-Protocol
originally	O
developed	O
by	O
Kasper	B-Protocol
Skårhøj	I-Protocol
,	O
whilst	O
the	O
word	O
“	O
light	O
”	O
was	O
sometimes	O
misunderstood	O
to	O
imply	O
that	O
the	O
CMS	B-Protocol
was	O
suitable	O
only	O
for	O
small	O
projects	O
.	O
</s>
<s>
In	O
2007	O
Packt	O
Publishing	O
named	O
TYPOlight	O
,	O
as	O
it	O
was	O
then	O
known	O
,	O
as	O
the	O
second-place	O
winner	O
in	O
its	O
awards	O
category	O
of	O
“	O
Most	O
Promising	O
Open-Source	B-Application
CMS	B-Protocol
”	O
.	O
</s>
<s>
The	O
following	O
books	O
on	O
Contao	B-Language
are	O
available	O
(	O
in	O
German	O
only	O
)	O
.	O
</s>
<s>
Leo	O
Feyer	O
:	O
Das	O
offizielle	O
Contao-Handbuch	O
:	O
Der	O
Leitfaden	O
für	O
Anwender	O
,	O
Administratoren	O
und	O
Entwicklung	O
(	O
Official	O
Contao	B-Language
manual	O
:	O
Guide	O
for	O
users	O
,	O
administrators	O
and	O
developers	O
)	O
.	O
</s>
<s>
Thomas	O
Weitzel	O
:	O
Mit	O
Contao	B-Language
Webseiten	O
erfolgreich	O
gestalten	O
:	O
Konzeption	O
,	O
Umsetzung	O
,	O
Beispielprojekte	O
(	O
Successful	O
Contao	B-Language
websites	O
:	O
design	O
,	O
implementation	O
,	O
sample	O
projects	O
)	O
.	O
</s>
<s>
Nina	O
Gerling	O
:	O
Contao	B-Language
für	O
Redakteure	O
:	O
Inhalte	O
editieren	O
und	O
verwalten	O
mit	O
dem	O
Open-Source-CMS	O
(	O
Contao	B-Language
for	O
editors	O
:	O
Edit	O
and	O
manage	O
content	O
using	O
the	O
open	O
source	O
CMS	B-Protocol
)	O
.	O
</s>
<s>
Anne-Kathrin	O
Merz	O
:	O
Contao	B-Language
:	O
Das	O
umfassende	O
Praxisbuch	O
(	O
Contao	B-Language
:	O
The	O
comprehensive	O
practice	O
book	O
)	O
.	O
</s>
<s>
Peter	O
Müller	O
:	O
Websites	O
erstellen	O
mit	O
Contao	B-Language
(	O
Create	O
websites	O
with	O
Contao	B-Language
)	O
.	O
</s>
<s>
Thomas	O
Reindlmeier	O
:	O
Contao	B-Language
:	O
Webseiten	O
clever	O
gestalten	O
(	O
Contao	B-Language
:	O
cleverly	O
designed	O
websites	O
)	O
.	O
</s>
