PDP-8/M

The PDP-8/E and PDP-8/M were similar computers. The 8/E was introduced in 1970 and had a linear power supply and room for 20 cards including the slots used by the processor. It sold for $6,500. The 8/M and 8/F were introduced in 1972. The M and F only had room for 10 slots and used a switching power supply to reduced the cost of the machine. They used the same cards as the 8/E. The 8/M was an OEM version of the 8/F for people who resold it as part of a system. The 8/M frequently didn't have the full front panel my unit has. All of these models were discontinued in 1978.