Virtual Machine technology applies the concept of virtualization to an entire machine, circumventing real machine compatibility constraints and hardware resource constraints to enable a higher degree of software portability and flexibility. Virtual machines are rapidly becoming an essential element in computer system design. They provide system security, flexibility, cross-platform compatibility, reliability, and resource efficiency. Designed to solve problems in combining and using major computer system components, virtual machine technologies play a key role in many disciplines, including operating systems, programming languages, and computer architecture. For example, at the process level, virtualizing technologies support dynamic program translation and platform-independent network computing. At the system level, they support multiple operating system environments on the same hardware platform and in servers. Historically, individual virtual machine techniques have been developed within the specific disciplines that employ them (in some cases they aren't even referred to as 'virtual machines'), making it difficult to see their common underlying relationships in a cohesive way. In this text, Smith and Nair take a new approach by examining virtual machines as a unified discipline. Pulling together cross-cutting technologies allows virtual machine implementations to be studied and engineered in a well-structured manner. Topics include instruction set emulation, dynamic program translation and optimization, high level virtual machines (including Java and CLI), and system virtual machines for both single-user systems and servers. The book examines virtual machine technologies across the disciplines that use them-operating systems, programming languages and computer architecture-defining a new and unified discipline. It is reviewed by principle researchers at Microsoft, HP, and by other industry research groups; and written by two authors who combine several decades of expertise in computer system research and development, both in academia and industry.

Completely updated and revised in a new edition, Principles of Development presents major principles and concepts in the field for an undergraduate audience. Emphasizing gene control as the key to understanding development, the third edition is written in accessible prose, utilizing an impressive art program - 650 full color figures - as well as summaries and diagrams throughout the text to illuminate conceptually challenging material. In addition, the third edition presents carefully selected articles for further reading that expound on principles covered in the text.