“…When dealing with several parallelisms at the same time we add some subscript or superscript to the symbols and S. The seminal book [18] covers the literature about parallelisms up to the year 2010. For the state of the art, various applications, connections with other areas of geometry and historical remarks, we refer also to [1], [3], [7], [13], [20], [26], [32] and the references therein.…”