The Technical crew, often abbreviated to "tech crew" or "techies", are the individuals employed behind the scenes (backstage) who control all the technical aspects of creating a concert, play, musical, opera or other live performance. In a broad terms, the participants in any production can be divided into one of three groups: the audience, the performers and the technical crew. The audience views the performance; the performers create the art; the technical crew is responsible for the design and operation of all the technical requirements of the production.

The role and composition of a tech crew can change significantly depending on the nature of an event, and often evolves as the production does. For example, in a simple theatre production, the technical crew might consist of a single person, operating the lights and controlling the volume of the sounds and music. In a large scale professional theatre productions, the technical crew can consist of dozens of different departments and may run into the hundreds of individuals. Each department has their own specific job that pertains to their area of expertise, but they are all part of the technical crew.

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