Complex sentence: The IBM System/360 Model 65 of the IBM System/360 family of mainframe computers, announced April of 1965, replaced two models, the Model 60 and Model 62, announced one year prior but never shipped.
Split into simpler sentences: The IBM System/360 Model 65 is a member of the IBM System/360 family of computers. It was announced April of 1965, and replaced two models, the Model 60 and Model 62, announced one year prior but never shipped.