1. AN ORGAN MULTIPLE SWITCHING SYSTEM COMPRISING, A FRAME, A PLURALITY OF THIN FLAT INSULATING CARDS SECURED IN SAID FRAME IN PARALLEL RELATION AND SPACED IN PAIRS TO PROVIDE SPACES OF UNIFORM THICKNESS BETWEEN THE CARDS OF SAID PAIRS, A PLURALITY OF FLAT SLIDES ARRANGED WITH ONE OF SAID SLIDES BETWEEN EACH OF SAID PAIRS, SAID PAIRS OF CARDS PREVENTING SIDEWISE MOVEMENT OF SAID SLIDES, MEANS FOR GUIDING SAID SLIDES FOR LONGITUDINAL MOVEMENT BETWEEN A RETRACTED POSITION AND AN ADVANCED POSITION, SAID SLIDES BEING FORMED TO PROVIDE A PLURALITY OF UNIFORMLY LINEARLY SPACED DEPRESSIONS ALONG THE SIDES THEREOF WITH RIBS BEING FORMED BETWEEN SAID DEPRESSIONS, THE DISTANCE FROM THE CENTER OF ONE OF SAID DEPRESSIONS TO THE CENTER OF AN ADJACENT RIB BEING OF THE ORDER OF THE DISTANCE BETWEEN SAID RETRACTED AND SAID ADVANCED POSITIONS, A PLURALITY OF CONTACT SETS MOUNTED ON SAID CARDS AND EXTENDING ACROSS SAID SLIDES, SAID CONTACT SETS HAVING ACTUATORS ENGAGING SAID SLIDES AND ADAPTED TO CLOSE OR OPEN THE CONTACTS IN A PARTICULAR SET DEPENDING UPON WHETHER THE ACTUATOR OF SAID SET ENGAGES A RIB OR ENTERS A DEPRESSION ON ITS SLIDE, SAID CARDS HAVING OPENINGS THERETHROUGH TO EXPOSE THE SIDES OF SAID SLIDES TO SAID ACTUATORS, PIVOTED ROCKER MEANS INTERCONNECTING THE ENDS OF SAID SLIDES AND ADAPTED WHEN ONE OF SAID SLIDES IS ADVANCED TO RETRACT ALL OF THE OTHER SLIDES, AND MEANS FOR INDIVIDUALLY RETRACTING OR ADVANCING SELECTED ONES OF SAID SLIDES.