Whyte notation
The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte, and came into use in the early twentieth century following a December 1900 editorial in "American Engineer and Railroad Journal". The notation counts the number of leading wheels, then the number of driving wheels, and finally the number of trailing wheels, groups of numbers being separated by dashes. Other classification schemes, like UIC classification and the French, Turkish and Swiss systems for steam locomotives, count axles rather than wheels.
William Foote Whyte
Whyte, from an upper-middle-class background, showed an early interest in writing, economics and social reform. After graduating from Swarthmore College, he was selected for the Junior Fellows program, where his landmark research was done. After his research in Boston, he entered the sociology doctoral program at the University of Chicago. "Street Corner Society" was published by the University of Chicago Press in 1943. He spent a year teaching at the University of Oklahoma, but developed polio in 1943 and spent two years in physical therapy at the Warm Springs Foundation. Rehabilitation was only partially successful; Whyte walked with a cane for the rest of his life, and used two arm crutches in his later years.