CAUTION: The Sender of this email is not from within Dalhousie. Dear Colleagues, It is a pleasure to let you know that a special volume of Theory and Applications of Categories will be published in honor of our friend Bob Rosebrugh. As you know Bob has recently stepped down from his role as Managing Editor of TAC after 25 years of admirable work. We have no doubt that many colleagues would like to thank him for his generous commitment to the journal and his scientific contributions. To submit a paper you should send the pdf file to the address marino.gran@uclouvain.be<mailto:marino.gran@uclouvain.be>, possibly suggesting one of the guest editors Michael Johnson, Walter Tholen, Richard Wood and Marino Gran to be assigned to the paper. All submissions should be within the scope of Theory and Applications of Categories, and will be carefully refereed following the standards of the journal. The deadline for submitting the articles is December 31st, 2020. With best regards, Michael Johnson, Walter Tholen, Richard Wood and Marino Gran [For admin and other information see: http://www.mta.ca/~cat-dist/ ]