UNIX操作系统，是美国AT&T公司于1971年在PDP-11上运行的操作系统。具有多用户、多任务的特点，支持多种处理器架构，最早由肯·汤普逊（Kenneth Lane Thompson）、丹尼斯·里奇（Dennis MacAlistair Ritchie）和Douglas McIlroy于1969年在AT&T的贝尔实验室开发。这是北航的LINUX课程的课件。-UNIX operating system, AT &　T, the United States in 1971, running on the PDP-11 operating system. With a multi-user, multi-tasking features, support multiple processor architectures, the first by Ken Thompson (Kenneth Lane Thompson), Dennis Ritchie (Dennis MacAlistair Ritchie), and Douglas McIlroy in 1969 at the AT &　T' s Bell experiment chamber development. This is the LINUX Beihang course courseware.