This is the first volume of a series that will update the book OpenVMS AXP and Data Structures Version 1.5. This volume covers the new scheduling model in Open VMS Alpha Version 7.0, which includes executive support for multithreading. It also discusses the life of a process, from creation to deletion. The series is the most comprehensive and detailed description available of any commercial operating system. It is intended for systems programmers, technical consultants, application designers, and other computer professionals interested in learning the details of the OpenVMS Executive. Teachers and students of graduate and advanced undergraduate courses in operating systems will also find this series a valuable study in how theory and practise are resolved in a complex commercial operating system.