Abstract
In the following text an attempt has been made to condense the main points of the MEIPIC-2 conference, to correlate certain results scattered over different contributions, to give some comments, suggestions for future work and a few historical reference points. Those contributions which have been less discussed, reflect simply the incompetence of the writer and not a ranking. The names in brackets without indication of the year represent authors of these Proceedings (see AUTHOR INDEX). The other references with numbers are given at the end of this Introduction. The subdivision in Sections 01. to 10. is a pragmatic one, implying many crossovers.