The Series 3 (350U, 300U) is a paperback-like subnotebook that has been optimized for a mobile environment. It is like a paperback in that the two-toned connecting edge conceals the hinge as much as possible. The division of the surface results in a smaller appearance. The sides were designed to ensure a natural connection between the LCD and system area when the notebook is open. This has created a natural image, just like an open book. The interior and exterior sport a hairline metal surface for increased sophistication.