MELCOM 3100 series

As computers entered the 3rd generation, the focus turned to the general applicability of software -- as exemplified by the IBM System/360 -- and the industry caught on to the idea of "family series" where the same software could be shared over multiple models. The MELCOM 3100 Series from Mitsubishi Electric was a series which adopted this family approach. It was announced in 1966 and was comprised of 3 models (the Model 10, Model 30 and Model 50) to enable step-by-step expansion of capabilities.