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Excalibur BBS
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<p>Excalibur BBS was a Windows-based <a href="/facts/GUI/fDHYWMU8">GUI</a> <a href="/facts/Bulletin_board_system/22d9c9s2">BBS</a> <a href="/facts/Software/RP79lVSW">software</a> developed by Excalibur Communications. it was released in 1993, but it has not been supported since 1999 when Excalibur Communications ceased operations. </p>