Category
Signaling History
A Short History of Flag Semaphore
Before radio, navies and railways signaled across distance with flags and mechanical arms. Here's how flag semaphore developed and why it stayed in use long after wireless arrived.
From Telegraph to Wireless: How Morse Code Outlived the Telegraph
Morse code was invented for a wired telegraph network in the 1830s and 1840s — but it didn't disappear when the telegraph did. Here's how it made the jump to wireless and amateur radio.