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Friction induced vibrations in brakes are a topic of major interest and concern for the automotive industry. The structural vibrations that may occur, as well as the audible noise that can be related to them, may lead to consequences as diverse as driver discomfort, maintenance requirements, and even safety issues. Although friction induced vibrations are known already since the beginnings of friction brake design, a generally accepted consensus on many aspects, like fundamental mechanisms or generic solution approaches, seems still to be debated. The present paper attempts to shed some light on the reasons for these persisting difficulties. A review of the different classes of phenomena appearing is given, which could be understood as an attempt to limit the scope of phenomena considered as friction induced. Research topics and disciplines involved will be identified and a clarification of achievements and unanswered questions will be attempted.