The PMS and ISP descriptive systems for computer structures

In this paper we propose two notations for describing aspects of computer systems that currently are handled by a melange of informal notations. These two notations emerged as a by-product of our efforts to produce a book on computer structures (Bell and Newell, 1970). Since we feel it is slightly unusual to present notations per se, outside of the context of particular design or analysis efforts that use them, it is appropriate to relate some background history.