PDP-8/F

The PDP-8/F is a later and slightly reduced version of the PDP-8/E. The 8/F has a smaller and lighter switched mode power supply than the linear power supply of the 8/E. The OMNIBUS backplane of the 8/F is half the size of the 8/E's backplane, )10 slots as opposed to 20). The only other difference between the two machines is that the 8/F uses LED lamps rather than filament bulbs in the programmer's console.