The era of the minicomputer generally begins in the 1960s with cheap (for the time this means a computer costing less than US$10,000 that did not require special cooling or power), reliable computers introduced by Digital Equipment Corporation. Other minicomputers were brought to market by Data General and Hewlett-Packard.
My first serious programming was on a PDP-11/70 running RSTS/E using BASIC-PLUS when I was an early teenager -- before I learned algebra, trigonometry or any serious mathematics. The PDP-11/03 is the smallest member of the PDP-11 family, while the PDP-11/70 is the largest member of that family.
Current holdings in the collection: