:::::::::Well, I actually used to work in telecommunications- specifically fibre optic equipment R&D;, and, so far as I am concerned, all modern telecommunications can be considered to be fully digital end-to-end. Certainly all fibre is digital, all cell phones, WiFi, Ethernet, USB etc. The days of Strowger exchanges are far behind us! But we certainly need to find some more references. There's still some analog broadcast and two-way radio that is still just about hanging on, but that's about it I think.