The GdR MACS undertakes to disseminate to the community as a whole any information it may collect that is of general interest to the community. This primarily concerns MACS activities (news of Actions and Events organized by MACS), but also information concerning other events, thesis and job offers, information on calls for tender, etc. Affiliates are invited to submit this information via the site. To do so, simply log in and add content. The newsletters are available below and are also sent to the entire community via the total-gdrmacs@services.cnrs.fr mailing list (a list intended solely for this newsletter).