This report describes the abstraction mechanism of a prototype systems implementaiton language for Intel's iAPX-432 microprocessor. Full exploitation of the 432's facilities places many demands on a language intended for systems implementation. The 432 is a capability-based machine, with hardware-enforced typing of large objects, dynamically instantiated domains (i.e., packages), hardware-enforced information information hiding (seals), and hardware-supported, software-defined access-rights (trademarks). The prototype language's support for these facilities is described in this project.