Useful.
technologists (the so-called Eggheads) all over the world were trying to make publicly utile and commercially rewarding the extremely elaborate and still very expensive, hydrodynamic telephones and other miserable gadgets […]
A theoretical unit of measure of utility, for indicating a supposed quantity of satisfaction derived from an economic transaction.
Rational agents always maximize the number of utiles procured; that is, they will always choose those outcomes which promise to produce the most utiles.
From Middle French utile, from Old French utele, from Latin ūtilis.
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