High Quality Content by WIKIPEDIA articles! An Ultrabook is a higher-end type of subnotebook defined by Intel. Intel has applied to register the name as a trademark. Ultrabooks are designed to feature reduced bulk without compromising performance and battery life. They use low-power Intel Core processors, solid-state drives, and unibody chassis to help meet these criteria. Due to their limited size, they typically omit common laptop features such as optical disc drives and Ethernet ports.