The primary goal of the journal is to promote communication and increase dissemination of new results and ideas among mathematicians and computer scientists who use categorical methods in their research. The journal focuses on applications of results techniques and ideas from category theory to mathematics in particular algebra analysis order and topology and to computer science. These include the study of specific topological algebraic and algebraic-topological constructs categorical investigations in functional analysis in continous order theory in algebraic and logical type theory in automata theory in data bases and in languages. Furthermore the journal intends to follow the development of emerging fields in which the application of catagorical methods proves to be relevant. The journal will publish both carefully refereed research papers and survey papers. In all cases it strives for significance originality good exposition and the highest scientific quality in its publications.