Shortwave Listening…
Shortwave Schedule – What’s being broadcast right now!
SWL Archive – Excellent source of current info on worldwide SWL stations and an archive of SWL broadcasts for several stations.
Your Guide to Shortwave Radio Listening, News and Reviews – A beginner’s guide
Wikipedia – Concise overview of Spy Numbers Stations. Read this to better understand the history of Spy Numbers. A numbers station is a category of shortwave radio stations characterized by broadcasts of formatted numbers, addressed to intelligence officers operating in foreign countries.
Wikipedia – Shortwave radio entry briefly touches on many aspects of shortwave listening.
SWL Nostalgia Site – Loaded with interesting articles and links.
Citizens Band…
Wikipedia – CB radio entry,
CB World – 11m is where many hams got our start.
General Mobile Radio Service & Family Radio Service…
Wikipedia – GMRS radio entry.
Wikipedia – FRS radio entry with information on the FRS realtionship with GMRS.
myGMRS – Many consider GMRS to be very similar to VHF/UHF amateur radio without the tests.
Midwest GMRS – GMRS Repeaters by State.
Multi-Use Radio Service…
Meshtastic…