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http://www.suburbia.com.au/%7Edan
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http://www.spamhelp.org/shopenrelay
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http://permalink.gmane.org/gmane.comp.python.announce/5521
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http://dev.riseup.net/bamboo
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http://www.aggsoft.com/rs232-pinout-cable/pinout-and-signal.htm
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http://changelog.complete.org/node/375