System’s evaluation was divided into 3 main areas,
including system usefulness/efficacy, user interface, and
system performance. First, usefulness evaluation included
questions like how appropriate for using tablet PCs in a
presentation, how easy in accessing the slides for both the
presenter and the viewers, how supportive of collaborative
working, how supportive of various kinds of mobile devices,
and how practical for uses in both classrooms and meeting
rooms. Second, user interface evaluation included questions
like user friendliness, quality of presentation files, effective
uses of icons or affordance, effective uses of colors,
appropriate sizes of components like button size or display
area. Last, performance evaluation included questions on
usability, functionality, response time, annotations and
highlights, task operating sequence, savable work and its
quality, authentication, data security, and error notification