Thanks to "lolwut" ( http://home.xs4all.nl/~lolwut ), Rutger "slush" (
http://djslash.org/ ) and some other Stack-ers (the Eindhoven TU/e microcomputer
user group) visiting the 2011 T-DOSE ( http://www.t-dose.org/ ) conference in
Eindhoven for teaching me about process groups, signal handling and related
concepts.