the.com/relay

a baton passed at full sprint, where dropping it ends everyone's race at once

means To receive something — a message, signal, or object — and pass it along to the next person or stage, often in a coordinated chain.

from From Old French 'relaier,' meaning to leave behind or release, built from 're-' (back) and 'laier' (to leave). It first described the fresh horses or hounds set out along a route so a tired team could be swapped for a rested one mid-journey — a hand-off of effort. The athletic relay race and the electrical relay both borrow that same idea: one runner, or one current, taking over from another.

electrical roots
Tiny switches that let small currents control big ones
telegraph origin
Named for fresh horses swapped at relay stations
4x100 secret
Runners never fully stop, handing off blind backward
first computers
Early machines clicked with thousands of relays
the bug
A literal moth in a relay coined debugging
for instance

tokyo 2020 4x100m relay — italy's 37.50s gold, breaking europe's 40-year record in athletics

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