Dear Colleagues, A Workshop on Categorical Methods in Non-Abelian Algebra will be held in Coimbra, from May 30 to June 01, 2016. In case you want to participate please send a message tommc@mat.uc.pt, as soon as possible, and not later than April 30, 2016. Participants are warmly invited to present talks. Deadline for abstract submission (by email tommc@mat.uc.pt): April 15. Updated information on the scientific program can be found at the workshop webpage: www.mat.uc.pt/~mmc/mcana/MCANAfourthworkshop.html The Organizers: Maria Manuel Clementino Mathieu Duckerts-Antoine Gon?alo Gutierres Andrea Montoli [For admin and other information see: http://www.mta.ca/~cat-dist/ ]