Dear Mathematicians Our colleague Max Kelly turns 70 on 5 June 2000. To commemorate this milestone, and in recognition of Max's significant contribution to mathematics (especially category theory), there will be a special volume of the Journal of Pure and Applied Algebra dedicated him. The appropriateness of this Journal is clear as Max has been on the editorial board since its inception. The Editors for this special volume will be Aurelio Carboni (representing the regular editorial board), George Janelidze and me (as guest editors). We hereby call for submission of papers. We would like those of you have published with Max, worked with him, used his results, or simply respected his work, to consider contributing a research article. The standards of the Journal will be upheld by the usual refereeing procedure. ****The deadline for submission is 28 November 2000.**** Please send your article to one of the editors: A. Carboni Università degli Studi dell'Insubria Dipartimento di Scienze Chimiche, Fisiche e Matematiche Via Lucini 3 22100 Como ITALY E-mail: <acarboni@mailserver.unimi.it> , Professor George Janelidze Departamento de Matematica Universidade de Aveiro 3810-193 Aveiro PORTUGAL Email: <janelidze@mat.ua.pt> , Professor Ross Street Mathematics Department Macquarie University N. S. W. 2109 AUSTRALIA Email: <street@math.mq.edu.au> Sincerely, Ross