Zenbook are a family of ultrabooks (low-bulk laptop computers) produced by Asus. The first Zenbooks were released in October 2011, and the original range of products was amended and expanded during 2012. Models range from 12-inch laptops, featuring power efficient components but lacking connectivity and having only integrated graphics processors, to 15-inch laptops with discrete graphics processing units and optical disc drives.
Most (though not all) Zenbooks use Intel Core ultra-low-voltage processors and Nvidia GPUs when integrated graphics are not used.
Based on https://en.wikipedia.org/wiki/Zenbook.