Who else is working on this, and where: over any shared surface, each person's pointer in the colour their name always gets, with a name flag, gliding between the positions your realtime service sends; their selections outlined in the same colour, a short message beside the pointer when they type one (press / for your own), quieter when they go idle and fading when they leave. Positions are fractions of the surface, so every screen size agrees. (Beamline complete system)