Complex sentence: Core's second hardware and major software product also catered to the IBM orphans, a device and software that allowed IBM 5110/20 users to transfer data and programs from old bulky computers into new personal computers, which in 1981 were revolutionizing the computer industry.
Split into simpler sentences: CORE's second hardware and major software product also catered to the IBM orphans. It was a device and software that allowed IBM 5110/20 users to transfer data and programs from their old bulky computers into the new personal computers, which in 1981 were revolutionizing the computer industry.