Engineers from Irfu's Division of Systems Engineering (DIS), co-managers of several EPICS sub-projects, took part in a particularly rewarding "Document-athon" experience, both technically and humanely.
EPICS is a collection of open-source software tools for managing the control-system part of an experiment. This is a vast and complex subject, which is constantly evolving and therefore needs to be properly documented. This documentation effort requires a lot of resources.