Editorial. Articles:- I. The Development of Tarski's Concept of Truth. Semantic Revolution - Rudolf Carnap, Kurt Godel, Alfred Tarski J. Wolenski. Theories of Truth: Vienna, Berlin, and Warsaw I. Niiniluoto. Truth before Tarski H. Sluga. II. The Interaction between Tarski and the Vienna Circle. How the Unity of Science Saves Alfred Tarski A. Burdman Feferman. Tarski and Godel: Between the Lines S. Feferman. Carnap's move to Semantics: Gains and Losses R. Creath. Tarsii and Carnap on Logical Truth - or: What is Genuine Logic? G. Schurz. III. Philosophical Aspects of Tarski's Concept of Truth and its Application in the Methodology of Science. Interplay of Philosophy and Mathematics in the Classical Theory of Truth J. Tarski. Is Antipsychologism still Tenable? A. Grzegorczyk. Why Should a Physical object Take on the Role of Truth-Bearer? A. Rojsczak. Lukasiewicz Theory of Truth, from the Quantum Logical Point of View M.L. dalla Chiara. Intuitionism and Logical Tolerance G. Sundholm. Tarski on Language and Truth W.K. Essler. Neurath's Opposition to Tarskian Semantics T. Mormann. Tarski and Wittgenstein on Semantics of Geometrical Figures L. Kvasz. IV. Technical Aspects of Tarski's Definition of Truth and Model Theory. Tarski's Truth Condition Revisited P. Weingartner. Undefinability vs. Definability of Satisfaction and Truth R. Murawski. Tarski's Guilty Secret: Compositionality J. Hintikka, G. Sandu. Should Tarski's Idea of Consequence Operation be Revised? R. Wojcicki. Remarks on a Carnapian Extension of S5 G. Gottlob. Report - Documentation: Letters to Kurt Godel, 1942-1947 (translated and edited by Jan Tarksi) A.Tarski. Neo-Positivism and italian Philosophy (1924--1973) P. Parrini. Review Essay: Critical Idealism Revisited -- Recent Work on Cassirer's Philosophy of Science T. Mormann. Reviews. Activities of the Institute Vienna Circle. Index of Names.