Capability-Based Computer Systems

During the mid-1980s, I was looking for technical information about the IBM System/38 and ran across the book "Capability-Based Computer Systems" by Henry M. Levy, published by Digital Press.

From the Amazon.com summary:

"The book describes early descriptor architectures and explains the Burroughs B5000, Rice University Computer, and Basic Language Machine. The text also focuses on early capability architectures. Dennis and Van Horn's Supervisor; CAL-TSS System; MIT PDP-1 Timesharing System; and Chicago Magic Number Machine are discussed. The book then describes Plessey System 250, Cambridge CAP Computer, and Hydra System. The selection also discusses STAROS System and IBM System/38 ... The book highlights Intel iAPX 432, and then considers segment and objects, program execution, storage resources, and abstraction support."