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Logbook of the World, or LoTW, is the ARRL's online system for confirming contacts. Instead of mailing QSL cards, both stations upload their logs, and when the two records of a contact agree, the contact counts as confirmed. Every upload is digitally signed with the free TQSL program, so award managers can trust where it came from, and confirmations count toward DXCC, Worked All States and other awards. Opened in 2003, LoTW is now the way most hams confirm contacts for awards. Read more…