"...science fiction is sort of like a sociological genome. It's a huge range of possible futures, most of them useless; some vital. You never really know in advance."
This is in some ways a unique idea from sf writers, who in the 1920's and 1930's were more inclined to deal with physical switches; also, you may want to find out more about the "Curtain" that this key controlled.
Compare to the softener key from Larry Niven's 1973 novel Protector.
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'Metallic Wood' Strong Like Titanium, Floats In Water
'A metal... light as cork and stronger than steel...'
Seabreacher, H.G. Winter's 1939 Torpoon
'Ken lay full-length in the padded body compartment, his feet resting on the controlling bars of the directional planes, hands on the torpoon's engine levers.'
Abundant Robotics Autonomous Apple Harvester Robot
'... little machines, that went from plant to plant... cutting off the ripe fruit.'
Charging An Electric Car In 2019 (Video), 1912 (Photo) And 1894 (Fiction)
'Recharge the batteries... in almost every town and village...'
Japan Uses Explosives On Asteroid
'...a tiny, rocket-powered projectile, drove towards the mysterious bulk. It hit, exploding into a cloud of incandescent vapour.'
Get Your Speeder Flying Motorcycle From Jetpack Aviation
'The flycycles were miracles of compact design.'
FLIR Black Hornet 3 Palm-sized Drone
These drones can provide situational awareness beyond visual line-of-sight capability.
Dockworkers Protest Driverless Trucks
'It resembled conventional human-operated transportation vehicles, but with one exception -- there was no driver's cabin.'
Flying Car Concept By Kash Sirinanda
'Each one consists of a hub with many tiny spokes... On the end is a squat foot, rubber tread on the bottom...'
Unfurl The Future! Huawei Mate X versus Galaxy Fold
'A paper thin polycarbon screen unfurled silently from the top of the unit and immediately grew rigid.'
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