Pulsar is an experimental IDE for Pharo, built with Spec. It aims to give programmers more leverage in their everyday work through faster navigation, richer feedback, deeper inspection, persistent lines of investigation, and a more fluid relationship with the running image. It is not simply a new browser, but an attempt to rethink the IDE as a coherent workbench for understanding, modifying, and evolving software. Esteban Lorenzano ( https://github.com/estebanlm ) studied Computer Sciences at Universidad de Buenos Aires, and worked since 1994 in several object-oriented and low-level technologies, in different software companies, serving in various positions from programmer to senior architect. In 2007 he co-founded Smallworks to offer Pharo-based agile development projects. Since 2012 he dedicated full time to developing the Pharo code and community. He works with the INRIA-EVREF team in Lille, France, as core developer for Pharo, being responsible with the coordination of new releases and the implementation and maintenance of several Pharo libraries. This will be an online meeting. If you'd like to join us, please sign up in advance on the meeting's Meetup page ( https://www.meetup.com/ukstug/events/317153223/ ) to receive the meeting details.