The 40th gathering of the Open Grid Forum will be held Wednesday, 15 January through Friday, 17 January 2014 on the campus of Oxford University in the United Kingdom. The Oxford e-Research Centre is helping to coordinate arrangements for this meeting. This meeting will follow closely after meetings earlier in the week of the EGI Federated Cloud project and will be closely scheduled to be convenient to attendees of the EUGridPMA and SCI groups to be held in Abingdon, no far away. We encourage all OGF working groups to meet. Registration for OGF-40 is open now. The OGF-40 program committee encourages the submission of session requests and proposals to supplement the program for the meeting. These may include, but are not limited to the following: • 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 Information on registration, travel, lodging, and the Call for Session Proposals is available on the OGF web site at http://ogf.org or directly at the following link: http://www.ogf.org/dokuwiki/doku.php/events/ogf-40