International Conference on Category Theory CT2007 June 17-23 Hotel Tivoli Almansor Carvoeiro, Portugal http://www.mat.uc.pt/~categ/ct2007 Proceedings Volume and Call for Papers We are happy to announce that the proceedings of CT2007 will be published in a Special Issue of the journal Applied Categorical Structures (ISSN 0927-2852). We strongly encourage speakers at the conference to submit a paper. As guest-editors we are responsible for the handling and refereeing of all papers for the special issue. Authors should submit their papers through one of us. The deadline for submission is Wednesday 28 November 2007. Instructions for authors and other information about the journal can be found at: <http://www.springer.com/east/home/generic/search/results? SGWID=5-40109-70-35542984-0>. Authors will use the Editorial Manager system <http://apcs.edmgr.com> In particular, when submitting their paper, they should choose Special Issue CT2007 as Article Type and then designate one of the three guest-editors to handle their paper. We look forward to a lively conference and your cooperation in producing a fine scientific record. Yours truly, Guest Editors for the Special Issue: Samson Abramsky <Samson.Abramsky@comlab.ox.ac.uk> Maria Manuel Clementino <mmc@mat.uc.pt> Ross Street <street@math.mq.edu.au>