1. PC aufräumen und optimieren :
Author: Jörg Schieb; Mirko Müller].
Library: Center and Library of Islamic Studies in European Languages (Qom)
Subject: Hardwareerweiterung.,Konfiguration (Informatik),Personalcomputer.
2. Voice over IP :
Author: [Jörg Schieb, Mirko Müller].
Library: Center and Library of Islamic Studies in European Languages (Qom)
Subject: voix sur le réseau IP -- manuel.
