Learning in the first professional job was examined in a study of 40 nurses, 27 engineers, and 16 accountants who were in their first full year of full-time employment after college in hospitals and firms located in the United Kingdom. Data were collected through the following activities: (1) interviews with the respondents; (2) 1- to 2-day visits to their workplaces; and (3) interviews with their managers/mentors and significant others in their workplaces. The first few months of full-time employment presented very different challenges and experiences across the three sectors. The accountants had 3-year contracts that included both training for professional examinations and work-based induction into the profession through a tightly structured apprenticeship system. Although the nurses had already qualified for their profession, they still faced a difficult transition because of their sudden assumption of extensive responsibility and immersion into a highly demanding, high-pressure environment with a very heavy workload. The engineers' workplaces all had accredited graduate training schemes. Across the occupations, informal support proved more important than formal support and social relationships were a significant factor in learning. (The bibliography lists 13 references. Appendixes constituting approximately 50% of the document contain excerpts from the field notes on and discussions of the experiences of new accountants, nurses, and graduate engineers.) (MN)