Key features of the Model 708A Switching System are: The switching system accepts one 7X7X switching card (front or rear panel installation). Digital I/O contained in the switching system (sixteen inputs and outputs with internal pull-up resistors). IEEE-488 bus or interactive programming. Storage of 100 sets of relay setups, which can be up- loaded or downloaded through the IEEE-488 interface. An active front panel LED display shows the present re- lay status, a stored setup, or an editing scratchpad. High-speed triggering of stored setups. Make/break and break/make switching programmable matrix by rows. Operation is transparent and indepen- dent of the relay setup. Maximum matrix size of 8 rows by 60 columns (480 crosspoints on one IEEE-488 address with five units connected in a master/slave configuration). Sealed construction, low heat producing design elimi- nates vent holes, which is suitable for cleanrooms. An optional light pen is available for interactive control of relays and editing stored relay setups.