A glass forming system having a plurality of machines, each of which includes a plurality of individual sections having movable components which operate in timed relationship with respect to one another. An electronic control system effects the automatic synchronous operation of the various individual sections of each machine to thereby automatically and continuously form hollow glass articles. The electronic control system includes a mini computer with associated storage units for storing data for controlling the operation of the glass forming machinery. Information is written into and read out of the mini computer by means of a printer and cathode ray tube console. An electronic interface unit connects commands from the mini computer to the control circuits for each of the sections of the glass forming machines and a group function machine component time varying circuit is connected to the mini computer via the electronic interface unit for changing the timing of selected groups of components in each of the individual sections of the glass forming machinery.