Henry M. Levy; Digital Press, 1984, ISBN 0932376223. Thorough survey and description of early capability and object based hardware and software systems. Out of print, available as free download, PDF format.
Persistent, pure capability, nanokernel OS, for IBM S/370 mainframe systems, by Key Logic, Inc. Influenced design of other capability OSs, notably EROS and successors. Set of papers, notes, patents, bibliography.
