At Home: A Short History of Private Life

by Bill Bryson

Dreyfuss didn’t design the dial itself. That had already been designed in-house, in 1917, by a Bell employee, William G. Blauvelt. It was Blauvelt who decided to put three letters with most, but not all, of the numbers. He assigned no letters to the first hole because in those early days the telephone dial needed to be rotated slightly beyond the first hole to generate a signal initiating a call. So the sequence ran 2 (ABC), 3 (DEF), 4 (GHI), and so on. Blauvelt left out Q from the outset, because it would always have to be followed by a U, limiting its utility, and eventually dropped Z as well because it didn’t feature enough in English to be useful. Every exchange was given a name, usually derived from the street or district in which it stood—Bensonhurst, Hollywood, Pennsylvania Avenue, for instance, though some exchanges used the names of trees or other objects—and the caller would ask the operator to be connected to “Pennsylvania 6–5000” (as in the Glenn Miller tune) or “Bensonhurst 5342.” When direct dialing was introduced in 1921, the names were reduced to two-letter prefixes and the convention became to capitalize those letters, as in HOllywood and BEnsonhurst. The system had a certain charm, but became increasingly impractical. A lot of names—RHinelander or SYcamore, say—were susceptible to confusion among those whose spelling was not of the first order. Letters also made it difficult to introduce direct dialing from abroad since foreign phones didn’t always come w...