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Comments to #30
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Valentina 9 hours ago
#40 Early SONAR maybe but not RADAR.
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Derrick 6 hours ago
#21 man I don't know what kind of cars have you had since but practically all cars have that option for the past twenty years.
Difference Engine
Though one was never built in his lifetime, Charles Babbage proposed his idea for a difference engine, a kind of minimalist steampunk take on what a computer should do.
His ideas helped lay the foundation for the personal computers we have today.