Likewise, Ilena M. Norton reminds us that the category of Native American and Alaska Native includes "over 550 federally recognized tribes and Alaska Native villages," each of which has "important differences in language, customs, family structure, illness experiences, and healing traditions" (p. 78). This uneasy, cautionary posture takes on even greater significance when we consider that the U.S. system of racial classification is undergoing a major revision. In October 1997, the U.S. Office of Management and Budget declared that, for the first time in U.S. history, people can identify themselves on the census and other official forms as belonging to more than one of the five racial categories. The five official racial categories are 1) white, 2) black, 3) Native American, Eskimo, and Aleut, 4) Asian, and 5) Hawaiian and Pacific Islander. The official ethnic categories are 1) Hispanic and 2) non-Hispanic. Note that Hispanics can be of any race. The Office of Management and Budget has yet to decide how it will count people who identify with more than one race. The number of racial categories could be as small as five categories or as large as 63, depending on how people respond to the race question. The number 63 represents the number of ways the five official racial categories can be combined.