[en] The Condensed-History Monte-Carlo method for charged particles transport is reviewed, starting from a general form of the Boltzmann equation. Subjects related to the practical implementation of a computer simulation are explicitly discussed, including the physics and the numerical development of charged particle interactions with particular attention to electron-matter elementary processes, and problems related to the approximations proper to the theoretical formulation like the energy straggling treatment, boundary crossing and lateral deflections, corrections to the continuous slowing-down description, and a brief sketch of the variance reduction techniques. A broad discussion about the currently available computer code packages and their performances, and a summary of applications of coupled photon-electron codes is also included. 66 refs