We are pleased to announce that the 100th meeting of the Peripatetic Seminar on Sheaves and Logic will be held in Cambridge on 21-22 May 2016, in the month which sees the fortieth anniversary of the first meeting of the seminar. Sender: categories@mta.ca Precedence: bulk Reply-To: Peter Johnstone <ptj@dpmms.cam.ac.uk> We are also delighted to announce that Dana Scott, who hosted the first PSSL in Oxford, will be present for this weekend, and he will be delivering the annual Mordell Lecture of the Cambridge Faculty of Mathematics on the afternoon of Friday 20 May. Further details and a registration form will be circulated nearer the time, but we thought people might wish to get the date into their diaries before the New Year. Peter Johnstone [For admin and other information see: http://www.mta.ca/~cat-dist/ ]