english: Then, about 150 years ago, there was a revolution in recorded media other than print: first photos, then recorded sound, then movies, all encoded onto physical objects.
non_english: V tretjem obdobju - pred 150 leti - je prišlo do revolucije na področju shranjevalnih medijev, ki niso tisk. Najprej fotografije, nato zvočni posnetki in potem filmi, shranjeni v fizični obliki.