The ElectroMagnetic Transients Program (EMTP) was first developed by Prof. Hermann Dommel in the 60s/70s for the analysis of electromagnetic transients. It was commercialised in 1987 and released as DCG EMTP and later EMTP96. EMTP-RV is the latest commercial released of the program, created by Jean Mahseredjian and currently being developed by POWERSYS.

Reference: EMTP-RV