Harrison David Horblit (1 May 1912, in Boston – 8 March 1988, in Danbury) was a philanthropist and collector of books, manuscripts, and photographs.
Horblit's wife Jean (née Mermin) donated most of this collection to Harvard's Houghton Library in 1995.
"[3] Horblit was a collector of rare books related to the history of science, navigation and mathematics.
About 1964 Horblit designed a "Bibliographical Collation Computer", a 128 x 245 mm card in a plastic sleeve which operates much like a slide rule in which the letters of the alphabet are correlated with the pagination values of formats of 1, 2, 4, 6, 8, 10,12, 16, 20, 24, and 32 leaves.
For many years Harrison and Jean Horblit spent two months each summer yachting along the Maine coast.