Complex sentence: Memorex's peripheral equipment businesses missed the transition from mainframes to servers and/or personal computers so in the 1980s Memorex was dismembered by its then owners, first Burroughs and then Unisys.
Split into simpler sentences: Memorex's peripheral equipment businesses missed the transition from mainframes to servers and personal computers. In the 1980s Memorex was dismembered by its then owners, first Burroughs and then Unisys.