The basic tenet of one-to-one computing is that the student and teacher have Internet-connected, wireless computing devices in the classroom and optimally at home as well. Also known as "ubiquitous computing," this strategy assumes that every teacher and student has her own computing device and obviates the need for moving classes to computer labs. While several significant one-to-one laptop programs have been implemented since 2000, there are still relatively few large scale programs with longevity. This report examines the largest state-driven one-to-one computing initiatives in Maine, Michigan, Texas, and Pennsylvania as well as district-wide laptop programs in Henrico County, Virginia and Talbot County, Maryland. With the exception of Pennsylvania, each of these programs is an example of ubiquitous computing, in which at least some students are permitted to take the laptop computers home. (Contains 16 resources and 84 footnotes.)