Disneyland originated many concepts which have become part of the corporate culture of Disney Parks as a whole, and which in turn spread to its other parks. Most importantly, Disneyland staff use theatrical terminology to emphasize that a visit to the park is intended to be similar to witnessing a performance. Visitors are referred to as "guests" and park employees as "cast members". "On stage" refers to any area of the resort that is open to guests. "Backstage" refers to any area of the resort that is closed to guests. A crowd is referred to as an "audience". "Costume" is the attire that cast members who perform the day-to-day operations of the park must wear."Show" is the resort's presentation to its guests, such as the color and façades of buildings, placement of rides and attractions, costumes to match the themed lands. When signing credit card receipts, guests are asked for their "autograph". "Stage managers" are responsible for overseeing the operation of the park. Cast members who are in charge of a specific team are called "leads," as in a film or theater "lead role". In earlier years, the offices where administrative work took place were referred to as "production offices". "Production schedulers" build employee work schedules to meet the necessary workload, while "stage schedulers" handle day-to-day changes in that work schedule (such as a change in park hours, necessitating a change in everybody's shifts.) Each cast member's job is called a "role". When working in their roles, cast members must follow a "script", a code of conduct and approved, themed phraseology that cast members may use when at work. "No" and "I don't know" are notably absent from scripts.