Wikipedia says “A projectionist is a person who operates a movie projector. In the strict sense of the term this means any film projector and therefore could include someone who operates the projector in a show . In common usage the term is generally understood to describe a paid employee of a movie theater. They are also known as ‘operators'”.
In the digital age the number of projectionists who are left have greatly declined, but this section of the site is all about the projectionist, from what they do (did), what it is (was) like to be one through to the memories of projectionists past and present. If you want to know more about projectionists in the digital age, then have a look at the Digital Projectionists section.