sentences:  ", which was supervised by the Fraunhofer Society for applied research.There he invented technologies such as the high security solution Lock-Keeper and Tele-TASK for recording and Internet-broadcasting lectures and presentations.Between 1996 and 2007 Meinel was a member of the scientific board of the IBFI Schloß Dagstuhl and speaker of the special interest group on complexity of the German computer science society Gesellschaft für Informatik.