Short Wave will be the communication mode of survivors, but this is not a high technology issue. CB and Ham radios are in many hands, highly popular and much used, world wide. Radios can be cranked up for power, devices that can be purchased today, and used by the military in the field. No power requirements. PC use in short wave packet relay is more complicated, but home computers are prevalent, and hackers can adjust to the requirements if they have access to written instructions ahead of time, and many will! The community does not need all computer functioning, just one. It does not need major electrical support, just fast peddling on the bike gen rack for the hour. It does not need booster towers on every hill, as good hearted communities will find they are being boosted beyond their hopes, by helping hands behind the scenes.