Abstract :
Dear Readers: this is a very special issue: the last of 12 in the 12th volume of J.UCS! J.UCS has grown over the years tremendously, in importance and size, and it will continue this way. The fact that J.UCS is now available for free for everyone due to the generosity of a number of academic institutions will fur- ther increase impact and importance of the journal. Do spread the news: here is a reviewed publication, with a comparatively short turn-around cycle that appears first electronically, but then also always in printed editions. By the way, most of the printed volumes are still available and can be ordered via http://www.jucs.org/jucs info/print if you or your library are interested.