  Electronic presentations are rapidly becoming the standard for meetings in
large high energy physics collaborations. An attractive solution should combine
a central repository of presentation files with easy uploading and downloading
access over the wide area network. This allows all information to be instantly
shared within the collaboration, including remote participants at meetings. An
ideal system should allow operation of a whole session from a single PC,
without time-consuming switchovers between personal notebooks, and preserve the
information for summary talks etc. On the other hand, there should be no need
for manual collection of documents, and submission of slides should be possible
even seconds before the presentation.
  We present a system developed and currently used by the ZEUS experiment at
DESY. It provides a wide range of functions including registration of
participants, automatic agenda preparation, presentation submission, display
and archiving. A particular emphasis has been put on system security, with
access to the system being made via a secure web interface. Different privilege
levels are available within the system, according to the status of the user:
chairman, speaker or other meeting participant. We also discuss our experience
of using this system in a range of different contexts.
