Aviation inspires far less historical scholarship than other major forms of transportation technology, especially automobiles and trains—and even space travel. In the years leading up to the centennial of powered flight in 2003 there were some efforts by Dom Pisano, Roger Launius and others both to refine and expand the parameters of the field and suggest emerging research questions. Yet aviation history has remained a small subfield within broader areas of interest, such as military, technology, transportation and business history. More recently, to some degree in response to the efforts of Pisano and Launius, work has been done within social, cultural and urban history, and gender studies. So while the field has been and remains hard to pin down, nonetheless interesting—if sometimes isolated—work continues.