About the Authors Ole Henry Halvorsen is currently a senior software engineer at a leading manufacturer of professional video equipment, where he works on drivers and software for high-end HD video hardware for Mac, Linux, and PC. He was part of the team that created some of the earliest video hardware devices for both USB 3.0 and Thunderbolt. He holds a bachelor's degree in network computing and a master's degree in information technology from Monash University, Australia. He formerly worked as an R&D engineer at Silicon Graphics (SGI) where he worked on NAS and SAN storage technologies and solutions for supercomputing and high-performance computing. When not spending time with his family, he enjoys programming for the kernel, iOS, Linux, and the Web, as well as reading, watching movies, playing games, and keeping fit.