All except one of the these real-world applications have been made by Raspberry Pi, which one has not been made?

Question

Accepted Answer

Space-hardened computer aboard the International Space Station used to run code written by students

Answer

Pi-based wearable used to track elephant populations and their migrations in Botswana

Answer

Cluster of 750 Pis used to create a supercomputer at Los Alamos National Labs

Answer

Underwater remote-operated vehicle to explore sunken ships and underwater caves

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