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Communication Systems
Learn about amateur radio (via the American Radio Relay League)
Global Sustainability Radio Net (GSRN)
QRZ Callsign Database
International Amateur Radio Union
DX Central
HamQuick.com
AC6V Ham Radio Index
Amateur Radio on the WWW
The DX Zone
Packet Radio / Digital Communications Page (via TAPR).
National Hurricane Center (N4EHW) & Hurricane Watch Net
Federal Communications Commission
Rig Pix Database
Living Earth satellite image of day/night gray line
Community & Micro-radio Resources
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Electronics Tutorials
(Free!)
Radio 4 All
Crystal Radio project (via Journey To Forever)
Americans for Radio Diversity
Free Radio Berkeley
Community Radio
Free Radio Network
Communications for a Sustainable Future
National SKYWARN System
Urban farming school takes root
Fifth International Conference on Environmental, Cultural, Economic and Social Sustainability