Task-Oriented System - TOS

Task-oriented system--TOS--denotes either a hardware device or a software application that has a well-defined and finite set of capabilities; that is, any system that can perform a limited number of operations or tasks. An example of a TOS is a CD player that can play, rewind, forward, stop and identify the current track being played. A task-oriented system (TOS) is specified by the entities--domain objects (Section 1.3.3), TOS tasks(Section 1.3.4), TOS readings (Section 1.3.5) and TOS commands (Section 1.3.6)--and the relationships that exist between these entities.