In this presentation, Maximiliano Tabacman will be presenting the main features, abstractions and design decisions behind ERA, the Electronic Roleplaying Assistant ( https://preview.drivethrurpg.com/en/product/137825/ERA-for-Rolemaster ). ERA is currently being used to create characters and manage the adventures of many gaming groups across the world, supporting Navigator RPG, Against the Darkmaster, Rolemaster Classic, Rolemaster Fantasy and Rolemaster Unified. We will review how Pharo allows creating a deployed version that runs locally in Linux, Mac and Windows, while Digital Ocean and Auth0 allow running an online server with different user roles. https://pharo.org/success/RolPlayingAssistant.html We will also mention how ERA makes use of the different frameworks developed and maintained by the Buenos Aires Smalltalk group, hosted at Github. Maximiliano Tabacman ( https://www.linkedin.com/in/maximiliano-tabacman-9aa4b817b/ ) is a long time Smalltalker with a Phd from the University of Buenos Aires. He is a Software architect at Mercap, executive secretary at FAST and creator of ERA. This will be an online meeting from home. If you'd like to join us, please sign up in advance on the meeting's Meetup page ( https://www.meetup.com/ukstug/events/299364517/ ) to receive the meeting details. Don’t forget to bring your laptop and drinks!