{ "item_title" : "The Practical Telegraphist", "item_author" : [" Ralph Metternich "], "item_description" : "What can the telegraph teach us about computers, networks-and communicating clearly in everyday life? The Practical Telegraphist takes you inside the technology that first allowed information to travel faster than people. Through engaging explanations and carefully designed illustrations, Ralph Metternich reveals how telegraph keys, batteries, relays, sounders, railway dispatch systems, submarine cables, Morse timing, and early networks actually worked. More than a history book, this is a practical exploration of the ideas that still power modern communication: two-state signals, encoding, addressing, routing, synchronization, error checking, acknowledgments, and reliable message delivery. Inside, you will discover:How Morse code uses rhythm and silence-not merely dots and dashesHow a complete telegraph circuit sends and receives informationHow skilled telegraphists prevented costly communication errorsHow railways, news agencies, businesses, and ocean cables created a connected worldHow duplex, multiplex, punched-tape, and teleprinter systems increased network capacityHow telegraph principles helped shape digital communicationPractical exercises for learning Morse code and diagnosing signal problemsTimeless communication habits you can apply to work, emergencies, technology, and daily lifeIdeal for Morse code enthusiasts, computer and technology lovers, historians, radio operators, students, collectors, and curious readers, this illustrated guide transforms a remarkable invention into a clear and useful story of human ingenuity. Follow the signal from the first click of the key to the connected digital world-get your copy of The Practical Telegraphist today.", "item_img_path" : "https://covers3.booksamillion.com/covers/bam/9/79/819/186/9798191862606_b.jpg", "price_data" : { "retail_price" : "9.99", "online_price" : "9.99", "our_price" : "9.99", "club_price" : "9.99", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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