  This article is preface to the SIGMA special issue "Tensor Models, Formalism
and Applications", http://www.emis.de/journals/SIGMA/Tensor_Models.html. The
issue is a collection of eight excellent, up to date reviews on random tensor
models. The reviews combine pedagogical introductions meant for a general
audience with presentations of the most recent developments in the field. This
preface aims to give a condensed panoramic overview of random tensors as the
natural generalization of random matrices to higher dimensions.
