This text is identified, tested, and describes the basic concepts in the design of a common computer system throughout the operating system, networking, database systems, distributed systems, programming languages, software engineering, security, fault tolerance, and architecture. To support the focus on the design, the text identifies and explains the abstraction that has proved successful in practice, for example, remote procedure calls, client / service organization, file system, data integrity, consistency, and confirmed the message. Features: Concept design of computer systems are guided by fundamental principles. Cross-sectoral approach that identifies common abstraction for networks, operating systems, transaction systems, distributed systems, architecture, and software engineering. The case study that makes a real abstraction: naming (DNS and URL), file system (UNIX file system), clients and services (NFS), virtualization (virtual machine), scheduling (disk arm), security (TLS). Many pseudocode fragment that provide concrete examples of abstract concepts. Extensive support.