Special issue of the Journal of Language and Computation on Trees in Logic, Linguistics and Computer Science, edited by Dov Gabbay and Valentin Goranko CALL FOR PAPERS Submissions are invited of original (research or survey) papers on computational, linguistic, and logical aspects of the theory and applications of trees. The special issue will include refereed papers presented at the ESSLLI'2000 Workshop on Trees in Logic, Linguistics and Computer Science as well as other relevant papers of good quality. We expect the refereeing process to be completed by March 2001 and the volume to be ready for publication in the first half of 2001. EXTENDED DEADLINE FOR SUBMISSIONS: DECEMBER 15, 2000. Send all submissions electronically in Postscript format to Valentin Goranko at vfg@na.rau.ac.za