Markus Feilner is consultant for open source strategies from Regensburg. He has been working with Linux and FLOSS since 1994, was deputy editor-in-chief at both Heise iX and Linux-Magazin and Team Lead Documentation at SUSE. With his company Feilner IT, he has been helping IT professionals on OSI layers 8, 9, 10 and 11 for almost 25 years.