51. Common ground
In any collaborative system there is a need for awareness of others, of
artifacts, of progress and of process. Without this, no common ground exists.
Must be light weight or it won't be used. Must be transparent or we won't
know how to use it or it will get in the way. Must be acceptable to use
in a variety of situations
Example(s): Small floating icons or windows, quickly available info., discrete
pieces of info - pick and choose information want and need presence, availability,
location busy-users
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