Desk #2

Blips travel along a USB cable from the camera to the computer top right, then after a while along another USB cable to the backup drive with the WD logo, also top right.
All this depends on spike filtered mains, bottom left.
Sometimes they get printed, top left. They travel to you along a blue CAT 5 lead to a white RJ45 junction box and then along the school LAN or an independent broadband connection, to somewhere where they probably tidy the cabling into neatly tied looms, with little labels and something better than a bulldog clip on the desk leg to tie them to ...