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Changes in the NFPA 72: National Fire Alarm and Signaling Code 2010 Edition are extensive, so you're bound to have questions. When you do, the 2010 NFPA 72: National Fire Alarm and Signaling Code Handbook has answers that get you up-to-speed fast on state-of-the-art rules for fire alarm systems, new coverage of mass notification systems for emergencies other than fire, revised voice intelligibility requirements, new signaling rules for the deaf and hard of hearing and much more.