A professional writer may be freelance, meaning he or she works on a self-employed basis, or fully employed in an occupation where their primary responsibility is the production of specialized documentation, such as journalism, marketing, advertising, public relations, or the military. Yet even workers who don't necessarily think of themselves as professional writing practitioners regularly produce professional documentation regularly in the course of their work as lawyers, doctors, entrepreneurs, engineers, and social workers. Moreover, as Anne Beaufort observes, writing skills have become increasingly important to so-called "blue collar" occupations since "technologies have driven more record keeping and decision making to those who are directly involved in manufacturing, information-processing, and care-giving activities."