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APRS DB0ANF
Provides access to online station database in Germany.
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APRS in Switzerland
Information on APRS in Switzerland that includes software, real-time applications, and map files.
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APRSearch
Search application that targets sites from APRS software authors and other sites, with detailed documentation.
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APRS-IS Information
Internet-based network provides worldwide capabilities for public service and promotions of amateur radio.
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Bavarian Packet Radio Group
Contains information about BayCom packet radio hardware and software for radio amateurs.
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Byonics
Details about electronic projects and kits for GPS and APRS purposes. Includes product listings and contact facts.
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FBB
Features amateur packet-radio bulletin board software for DOS, Windows, and Linux.
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Northern California Packet Association(NCPA)
Committee of packet representatives in Northern California fosters the digital communication modes of amateur radio.
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OpenAPRS
Showcases real-time APRS data in Napa, California. Includes map guides, database information, and links.