Dear OGF colleagues, OGF 38b is almost upon us, completing the second of our two-part OGF 38 OGF gathering, the second of these gatherings for the year. OGF's third major event of 2013 will be OGF 39, which will take place in Madrid, Spain co-located with the EGI Technical Forum (http://tf2013.egi.eu). Please note that the early bird registration fees are already available and will rise to regular registration rates July 31<http://tf2013.egi.eu/registration/index.html>! The OGF 39 sessions will be followed by a Cloud Interoperability Workshop and Cloud Plugfest (http://cloudplugfest.org/cloud-interoperability-week), which are co-sponsored by OGF in cooperation with several other important cloud standards organizations. This is an exciting event that is already filling up with workshop talks and tutorials by many different projects and organizations. We are looking forward to co-hosting this important event. These activities comprise part of a Cloud Interoperability Week joint with several organizations focused entirely on this important topic. The OGF-39 program committee seeks active participation from the entire distributed computing community in all of these events, and encourages the submission of proposals that may include (but are not limited to) the following topics for the OGF 39 sessions. These topics can and should include regular meetings of OGF work groups where appropriate. * OGF Chartered Group Sessions * Birds of a Feather (BoF) Sessions * Tutorials * Interop / plugfest sessions * Federated Identity and Delegation * Data/Storage * Identity Management and Virtual Organizations * Production Infrastructure Interoperability * Software Sustainability for Grids and Clouds * Green IT, Energy Efficiency * Inter-cloud interoperability and SLA management * Networking for Distributed Computing Infrastructures * Performance measurement of Grids and Clouds * Science Clouds at large scales * Grid and Cloud Security * Distributed Desktop Grid and Volunteer Computing * Emerging Distributed Infrastructure * Campus Grids and Clouds * Data Management in Grids and Clouds * Federated Infrastructure Sessions can be requested a<http://redmine.ogf.org/projects/ogf39/issues/new>t this link: http://redmine.ogf.org/projects/ogf39/issues/new and will be scheduled primarily in the OGF session times Monday through Wednesday September 16-18, with tutorials and cooperative Cloud Interoperability Week events scheduled also primarily Wednesday through Friday Sep. 18-20. Where possible within the rooms available, we will try to schedule OGF sessions cooperatively with (or so as not to conflict with) other corresponding activities. Please also check the rest of the EGI TF 2013 schedule linked below. Further information on OGF 39 can be found at the event link at http://www.ogf.org/dokuwiki/doku.php/events/ogf-39 and at the EGI TF 2013 site and Cloud Interoperability Week links above. A preliminary schedule for the week's events in Madrid is available for your convenience at the link below. https://indico.egi.eu/indico/conferenceProgram.py?confId=1417 Send any further questions you may have to events@ogf.org<mailto:events@ogf.org> - Your OGF event planning team