Abstract: A slide projector control module and control system to operate one or more slide projectors located at one or more different locations, each slide projector having a slide tray and being connected with the control module. Conventional telephone lines are used to connect each slide projector and each module at each location for viewing the same slide at all locations. Slide projectors at all locations are capable of being rendered operative and the slide projector is operative only at its location with its associated control module when properly selected. Each module includes switches to connect and disconnect the remote and local projector from a key pad which provides touch tone signals capable of being muted from telephone lines. The control system is operable from a local or remote site to permit conferences to discuss a series of visuals and to recall the visuals as needed at each site of a multi-site and/or multi-person conference.