PHP for Office
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Apache Kafka
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OWASP Top 10
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PowerShell
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Android Security
Carsten Eilers
SQL Server 2014
Constantin Klein, Frank Geisler, Klaus Höltgen & Andreas Wolter
Windows Phone 8.1
Matthias Fischer, Gregor Biswanger & Tam Hanna
Big Data - Apache Hadoop
Bernd Fondermann, Kai Spichale & Lars George
C++
Rudolf Jansen
OAuth 2.0
Sven Haiges