6.4 > Draw diagrams showing a conceptual view and a process view of the architectures of the following systems:
A ticket machine used by passengers at a railway stations.
A computer-controlled video conferencing system that allows video, audio, and computer data to be visible to several participants at the same time.
A robot floor-cleaner that is intended to clean relatively clear spaces such as corridors. The cleaner must be able to sense walls and other obstructions.
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