<P> Dunder Mifflin is also depicted as struggling to accommodate the demands of a diverse workforce . Episodes have focused on sensitivity training sessions and other informal efforts . Sexual harassment has occurred often enough, however, that it has lent its name to an episode . Employment lawyer Julie Elgar started a blog analyzing each episode for plot developments likely to be actionable if they occurred in real life and estimating the legal bill and / or possible verdict the company would incur should a suit be filed--as Michael's former supervisor, Jan Levinson (Melora Hardin) did in one episode, alleging wrongful termination . Greg Daniels, the show's creator, said many episode plotlines are in fact based on anecdotes recounted during the sensitivity training he and the other members of the show's cast and crew are required to take annually as employees of NBC, a General Electric subsidiary . The episode "Boys and Girls" showed that the company strongly resisted unionization efforts by its employees, to the point of closing down a branch, as many real companies do or threaten to do in the same situation . </P> <P> The office and warehouse of the Scranton branch office were sets on the production company's office in Van Nuys, California, although a real office was used in the show's first season . For episodes in season two and beyond, scenes set in the parking lot made use of the exterior of the production company's office building . Since the stage set had no windows, writer Jennifer Celotta's office was dressed to look like Michael Scott's when the script called for him or someone else to look out the window into the parking lot . In the second and subsequent seasons, the office interiors and exteriors are at a different location in Van Nuys . </P> <P> Some viewers have presumed that the Pennsylvania Paper & Supply Company's tower, a downtown Scranton landmark which appears in video footage shot by cast member John Krasinski for the show's opening credits, is the Dunder Mifflin office . The real company, which also sells paper and office supplies, has welcomed the exposure (and increase in business) and has a ground - floor showroom where it sells both its products and T - shirts with the tower . It plans to add a Dunder Mifflin logo to the circular insets near the top of the tower . Mifflin Avenue ends adjacent to the Penn Paper & Supply building . </P> <P> The success of the show has led to the sale of actual products with the Dunder Mifflin logo as souvenirs . NBC sells branded T - shirts, mugs, calendars and other items at its website, as well as in the NBC store located in New York City . In 2006, the website 80stees.com ranked Dunder Mifflin second only to Duff Beer from The Simpsons as the best fictional brand . </P>

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