Complex sentence: In 1963, he sold off Ferranti UKs non-military computer operations, which included the design rights to the Ferranti-Packard 6000 computer, an act, which according to Vardalas, killed off the Ferranti-Packard computer business.
Split into simpler sentences: In 1963, he sold off Ferranti UKs non-military computer operations, which included the design rights to the Ferranti-Packard 6000 computer. According to Vardalas, this decision killed off the Ferranti-Packard computer business.