1941
Technology
Germany
Programmable digital computer Z3
Konrad Zuse's relay machine ran programs in binary floating point.
Why it mattered
The first working programmable digital computer.
Modern Era
1941
2 recorded milestones at this point in the record.
1941
Communication
United States
Hedy Lamarr and frequency hopping
Lamarr and George Antheil patented a spread-spectrum system to protect torpedo guidance.
Why it mattered
A principle now underlying Wi-Fi, Bluetooth and mobile networks.
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