For our first online meeting of the year, Stéphane Rollandin will talk to us about muO: musical objects for Squeak . The presentation will focus on some of the interactive tools and subsystems widely used in muO, that are of interest in their own right, and potentially useful to others. The main emphasis will be on the large family of zoomable fields, which are modular plotting editors. Stéphane will demonstrate the workflow they are designed for, and show in what sense it is a seamless and natural exploitation of the Morphic framework. The code for these tools is somewhat entangled with the muO package, so Stéphane will also provide a Squeak image taylored to help people find their way there. Stéphane Rollandin has been doing independent research on software for musical composition and representation for the last 20 years, during his whole careeer as a stay-at-home father. After developing the GeoMaestro system for KeyKit, and the Csound-x package for Emacs, he was introduced to Small