Like most of the shiny things we take for granted today, (non-naive, i.e. lock-free) collaborative editing originated at - wait for it - Xerox Parc, as part of the collaborative work enviroment project “Jupiter”, headed by Pavel Curtis. Besides collaborative whiteboarding and other stuff, Jupiter included concurrent (text) editing based on Operational Transforms, as documented in the paper “High-Latency, Low-Bandwidth Windowing in the Jupiter Collaboration System”.