Microcomputers as protective interfaces in computing networks

In a computing network environment, a user may have access to several different computers, each with its own command language. For the inexperienced user a uniform interface would be a great benefit. Since there is little possibility that a universal command language will ever be developed, we have devised a system in which a microcomputer is used to intercept all messages between the user and the orginal operating system, presenting a consistent interface to the user. This paper describes the design of such a protective interface and gives an account of experience with its use.