Leffert Lefferts Buck was an American civil engineer and a pioneer in the use of steel arch bridge structures.

Rensselaer Polytechnic Institute is a private research university in Troy, New York, with an additional campus in Hartford, Connecticut. A third campus in Groton, Connecticut, closed in 2018. RPI was established in 1824 by Stephen Van Rensselaer and Amos Eaton for the "application of science to the common purposes of life" and is the oldest technological university in the English-speaking world and the Western Hemisphere.