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In television programming, the situation comedy or sitcom may be recorded using either a multiple-camera setup or a single-camera setup. Single-camera sitcoms are often notable for their enhanced visual style, use of real-world filming locations and in recent years, for not having a laugh track (most single-camera sitcoms from the 1960s contained a laugh track). Some, but not all, single-camera comedy series may also be classified as comedy-drama, a genre which blends comedic and dramatic elements. The distinction between a sitcom and a comedy-drama series is based on the show's content, not its form.