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Ask Gothamist has devoted a considerable amount of pixels to cellphone etiquette and is happy to report that this issue is hardly exclusive to wireless communication. We found this manual from the 1940s, How to Make by Telephone, and it's as relevant today as it was 60 years ago. Advice like "Use a normal tone of voice" and "Ask if it's convenient to talk" could easily transfer to those oafs who whip out their cell phones at every available opportunity.

Via Heaneyland.