The design of the framework comprises two layers: a Security Module Layer (SML) that implements the security-check modules, and a System Interface Layer (SIL) that interfaces SML to the Android OS.
This chapter discusses how a dial plan is, in its most basic form, a system interface for telephony devices that allows users and equipment to connect to each other by using dialing strings.
In order to determine how such a system interface would be used by a designer and to obtain user feedback on its main features a practical user evaluation was undertaken involving ten participants each completing three cable harness design tasks with the system.
The work presented here has a different focus, and provides a system interface for I/O intended to replace the UNIX interface.
Playback of the instrument sound track is controlled by signals generated in the musical instrument and transmitted to a system interface box connected to the audio-video play back device, an audio mixer, and the head-mounted display.
Finally, apps are also banned not only for containing viruses, worms and other malware, but also for simply linking to them, as well as for modifying browser settings, which is now a system interface change banned alongside adding homescreen shortcuts, bookmarks or icons.
