In the last few decades, interest in new designs of Tesla turbines has led to a large body of literature published in journals, conference proceedings, and other forums. Various aspects related to Tesla turbines are presented as a review in the following sections. Section 2 provides a summary of numerous patents applied and/or obtained on Tesla turbomachinery. Section 3 gives a review of the different constructional designs proposed in the literature. Various parameters influencing the performance of Tesla turbomachinery that were studied by researchers and the techniques employed in the analysis of Tesla turbomachinery are discussed in section 4. In section 5 the wide range of applications for which Tesla turbomachinery is suitable and is in use is presented. Finally we conclude the paper with section 6.